electrical wizards?
#1
Guest
Posts: n/a
electrical wizards?
I've posted before about my son's oil light problem.
Comes on only when engine is fully warm and then goes off and on
randomly- oil pressure checked with guage on long test drive and is
marginal, but not critical.
Last week his auxillary fan died. It was a mechanical failure &
finally overheated the circuit bad enough to blow the 40A fuse under
the steering wheel.
I changed the fan and took it for a test drive this morning. No
oil light. . . Ever. . . I drove and drove and drove. . . .
..[maybe I'm starting to like test driving my son's Audi too much.<g>
So--- Is it possible that the hot wires/circuit from the fan was
cooking a transistor, resistor or some such. . .. or did I hit a wire
while routing the fan cable harness? The wiring was definitely
cooking before it blew the 40A fuse--- When I was testing the bad fan
circuit I blew the fuse & burned my fingers when I pulled it.
Thanks,
Jim
Comes on only when engine is fully warm and then goes off and on
randomly- oil pressure checked with guage on long test drive and is
marginal, but not critical.
Last week his auxillary fan died. It was a mechanical failure &
finally overheated the circuit bad enough to blow the 40A fuse under
the steering wheel.
I changed the fan and took it for a test drive this morning. No
oil light. . . Ever. . . I drove and drove and drove. . . .
..[maybe I'm starting to like test driving my son's Audi too much.<g>
So--- Is it possible that the hot wires/circuit from the fan was
cooking a transistor, resistor or some such. . .. or did I hit a wire
while routing the fan cable harness? The wiring was definitely
cooking before it blew the 40A fuse--- When I was testing the bad fan
circuit I blew the fuse & burned my fingers when I pulled it.
Thanks,
Jim
#2
Guest
Posts: n/a
Re: electrical wizards?
Jim,
Depending on the location of the oil pressure sensor wires relative to the
fan harness, mutual harness burning may be possible, and damaging the sensor
system while changing the fan is a definite possibility - BTDT too many
times. Could the car have been running too hot before the fan replacement
thinning the oil too much and causing a low pressure (is the coolant temp
lower now?)? Does the oil light come on when the ignition if first turned
on? Maybe check the pressure again with a gauge to see if there are any
changes.
Cheers!
Steve Sears
1987 Audi 5kTQ
1980 Audi 5k
1962 and '64 Auto Union DKW Junior deLuxes
(SPAM Blocker NOTE: Remove SHOES to reply)
"Jim Elbrecht" <elbrecht@email.com> wrote in message
news:h9e1g1lk3jm0rt46ev8cq4jbcirqotmtk6@4ax.com...
> I've posted before about my son's oil light problem.
>
> Comes on only when engine is fully warm and then goes off and on
> randomly- oil pressure checked with guage on long test drive and is
> marginal, but not critical.
>
> Last week his auxillary fan died. It was a mechanical failure &
> finally overheated the circuit bad enough to blow the 40A fuse under
> the steering wheel.
>
> I changed the fan and took it for a test drive this morning. No
> oil light. . . Ever. . . I drove and drove and drove. . . .
> .[maybe I'm starting to like test driving my son's Audi too much.<g>
>
> So--- Is it possible that the hot wires/circuit from the fan was
> cooking a transistor, resistor or some such. . .. or did I hit a wire
> while routing the fan cable harness? The wiring was definitely
> cooking before it blew the 40A fuse--- When I was testing the bad fan
> circuit I blew the fuse & burned my fingers when I pulled it.
>
> Thanks,
> Jim
Depending on the location of the oil pressure sensor wires relative to the
fan harness, mutual harness burning may be possible, and damaging the sensor
system while changing the fan is a definite possibility - BTDT too many
times. Could the car have been running too hot before the fan replacement
thinning the oil too much and causing a low pressure (is the coolant temp
lower now?)? Does the oil light come on when the ignition if first turned
on? Maybe check the pressure again with a gauge to see if there are any
changes.
Cheers!
Steve Sears
1987 Audi 5kTQ
1980 Audi 5k
1962 and '64 Auto Union DKW Junior deLuxes
(SPAM Blocker NOTE: Remove SHOES to reply)
"Jim Elbrecht" <elbrecht@email.com> wrote in message
news:h9e1g1lk3jm0rt46ev8cq4jbcirqotmtk6@4ax.com...
> I've posted before about my son's oil light problem.
>
> Comes on only when engine is fully warm and then goes off and on
> randomly- oil pressure checked with guage on long test drive and is
> marginal, but not critical.
>
> Last week his auxillary fan died. It was a mechanical failure &
> finally overheated the circuit bad enough to blow the 40A fuse under
> the steering wheel.
>
> I changed the fan and took it for a test drive this morning. No
> oil light. . . Ever. . . I drove and drove and drove. . . .
> .[maybe I'm starting to like test driving my son's Audi too much.<g>
>
> So--- Is it possible that the hot wires/circuit from the fan was
> cooking a transistor, resistor or some such. . .. or did I hit a wire
> while routing the fan cable harness? The wiring was definitely
> cooking before it blew the 40A fuse--- When I was testing the bad fan
> circuit I blew the fuse & burned my fingers when I pulled it.
>
> Thanks,
> Jim
#3
Guest
Posts: n/a
Re: electrical wizards?
"Steve Sears" <steve.sears@SHOESsoil-mat.on.ca> wrote:
>Jim,
>Depending on the location of the oil pressure sensor wires relative to the
>fan harness, mutual harness burning may be possible, and damaging the sensor
>system while changing the fan is a definite possibility - BTDT too many
>times. Could the car have been running too hot before the fan replacement
>thinning the oil too much and causing a low pressure (is the coolant temp
>lower now?)? Does the oil light come on when the ignition if first turned
>on? Maybe check the pressure again with a gauge to see if there are any
>changes.
As I reread my message I see how I misled you. I didn't *cause* a
problem-- I seem to have *fixed* it!<g> It was scheduled for a trip
to the dealer in part to see if they could come up with a cause for
the [apparently erroneous] oil pressure warnings.
The light still works when I have the car on acc --- but it isn't
coming on while the car is running.
And, yes the oil sensor is right near where the wire harness goes,
though I haven't followed the wires to see if they touch each other.
And as far as overheating, the coolant temp guage was running
perfectly on dead center while the oil light was acting up. The day
it overheated it went pretty far to right but never pegged--- and we
were just a block from home so it was only hot for a bit.
Jim
>"Jim Elbrecht" <elbrecht@email.com> wrote in message
>news:h9e1g1lk3jm0rt46ev8cq4jbcirqotmtk6@4ax.com.. .
>> I've posted before about my son's oil light problem.
>>
>> Comes on only when engine is fully warm and then goes off and on
>> randomly- oil pressure checked with guage on long test drive and is
>> marginal, but not critical.
>>
>> Last week his auxillary fan died. It was a mechanical failure &
>> finally overheated the circuit bad enough to blow the 40A fuse under
>> the steering wheel.
>>
>> I changed the fan and took it for a test drive this morning. No
>> oil light. . . Ever. . . I drove and drove and drove. . . .
>> .[maybe I'm starting to like test driving my son's Audi too much.<g>
>>
>> So--- Is it possible that the hot wires/circuit from the fan was
>> cooking a transistor, resistor or some such. . .. or did I hit a wire
>> while routing the fan cable harness? The wiring was definitely
>> cooking before it blew the 40A fuse--- When I was testing the bad fan
>> circuit I blew the fuse & burned my fingers when I pulled it.
>>
>> Thanks,
>> Jim
>
>Jim,
>Depending on the location of the oil pressure sensor wires relative to the
>fan harness, mutual harness burning may be possible, and damaging the sensor
>system while changing the fan is a definite possibility - BTDT too many
>times. Could the car have been running too hot before the fan replacement
>thinning the oil too much and causing a low pressure (is the coolant temp
>lower now?)? Does the oil light come on when the ignition if first turned
>on? Maybe check the pressure again with a gauge to see if there are any
>changes.
As I reread my message I see how I misled you. I didn't *cause* a
problem-- I seem to have *fixed* it!<g> It was scheduled for a trip
to the dealer in part to see if they could come up with a cause for
the [apparently erroneous] oil pressure warnings.
The light still works when I have the car on acc --- but it isn't
coming on while the car is running.
And, yes the oil sensor is right near where the wire harness goes,
though I haven't followed the wires to see if they touch each other.
And as far as overheating, the coolant temp guage was running
perfectly on dead center while the oil light was acting up. The day
it overheated it went pretty far to right but never pegged--- and we
were just a block from home so it was only hot for a bit.
Jim
>"Jim Elbrecht" <elbrecht@email.com> wrote in message
>news:h9e1g1lk3jm0rt46ev8cq4jbcirqotmtk6@4ax.com.. .
>> I've posted before about my son's oil light problem.
>>
>> Comes on only when engine is fully warm and then goes off and on
>> randomly- oil pressure checked with guage on long test drive and is
>> marginal, but not critical.
>>
>> Last week his auxillary fan died. It was a mechanical failure &
>> finally overheated the circuit bad enough to blow the 40A fuse under
>> the steering wheel.
>>
>> I changed the fan and took it for a test drive this morning. No
>> oil light. . . Ever. . . I drove and drove and drove. . . .
>> .[maybe I'm starting to like test driving my son's Audi too much.<g>
>>
>> So--- Is it possible that the hot wires/circuit from the fan was
>> cooking a transistor, resistor or some such. . .. or did I hit a wire
>> while routing the fan cable harness? The wiring was definitely
>> cooking before it blew the 40A fuse--- When I was testing the bad fan
>> circuit I blew the fuse & burned my fingers when I pulled it.
>>
>> Thanks,
>> Jim
>
#4
Guest
Posts: n/a
Re: electrical wizards?
Interesting.
I think that you should tell your son that it is important for you to 'test' his
Audi for a bit just to be sure it is corrected. Lots of country twisty roads and
aggressive driving for a month or two should help with the answer.
Jim Elbrecht wrote:
> "Steve Sears" <steve.sears@SHOESsoil-mat.on.ca> wrote:
>
>
>>Jim,
>>Depending on the location of the oil pressure sensor wires relative to the
>>fan harness, mutual harness burning may be possible, and damaging the sensor
>>system while changing the fan is a definite possibility - BTDT too many
>>times. Could the car have been running too hot before the fan replacement
>>thinning the oil too much and causing a low pressure (is the coolant temp
>>lower now?)? Does the oil light come on when the ignition if first turned
>>on? Maybe check the pressure again with a gauge to see if there are any
>>changes.
>
>
> As I reread my message I see how I misled you. I didn't *cause* a
> problem-- I seem to have *fixed* it!<g> It was scheduled for a trip
> to the dealer in part to see if they could come up with a cause for
> the [apparently erroneous] oil pressure warnings.
>
> The light still works when I have the car on acc --- but it isn't
> coming on while the car is running.
>
> And, yes the oil sensor is right near where the wire harness goes,
> though I haven't followed the wires to see if they touch each other.
>
> And as far as overheating, the coolant temp guage was running
> perfectly on dead center while the oil light was acting up. The day
> it overheated it went pretty far to right but never pegged--- and we
> were just a block from home so it was only hot for a bit.
>
> Jim
>
>
>
>>"Jim Elbrecht" <elbrecht@email.com> wrote in message
>>news:h9e1g1lk3jm0rt46ev8cq4jbcirqotmtk6@4ax.com. ..
>>
>>>I've posted before about my son's oil light problem.
>>>
>>>Comes on only when engine is fully warm and then goes off and on
>>>randomly- oil pressure checked with guage on long test drive and is
>>>marginal, but not critical.
>>>
>>>Last week his auxillary fan died. It was a mechanical failure &
>>>finally overheated the circuit bad enough to blow the 40A fuse under
>>>the steering wheel.
>>>
>>>I changed the fan and took it for a test drive this morning. No
>>>oil light. . . Ever. . . I drove and drove and drove. . . .
>>>.[maybe I'm starting to like test driving my son's Audi too much.<g>
>>>
>>>So--- Is it possible that the hot wires/circuit from the fan was
>>>cooking a transistor, resistor or some such. . .. or did I hit a wire
>>>while routing the fan cable harness? The wiring was definitely
>>>cooking before it blew the 40A fuse--- When I was testing the bad fan
>>>circuit I blew the fuse & burned my fingers when I pulled it.
>>>
>>>Thanks,
>>>Jim
>>
>
I think that you should tell your son that it is important for you to 'test' his
Audi for a bit just to be sure it is corrected. Lots of country twisty roads and
aggressive driving for a month or two should help with the answer.
Jim Elbrecht wrote:
> "Steve Sears" <steve.sears@SHOESsoil-mat.on.ca> wrote:
>
>
>>Jim,
>>Depending on the location of the oil pressure sensor wires relative to the
>>fan harness, mutual harness burning may be possible, and damaging the sensor
>>system while changing the fan is a definite possibility - BTDT too many
>>times. Could the car have been running too hot before the fan replacement
>>thinning the oil too much and causing a low pressure (is the coolant temp
>>lower now?)? Does the oil light come on when the ignition if first turned
>>on? Maybe check the pressure again with a gauge to see if there are any
>>changes.
>
>
> As I reread my message I see how I misled you. I didn't *cause* a
> problem-- I seem to have *fixed* it!<g> It was scheduled for a trip
> to the dealer in part to see if they could come up with a cause for
> the [apparently erroneous] oil pressure warnings.
>
> The light still works when I have the car on acc --- but it isn't
> coming on while the car is running.
>
> And, yes the oil sensor is right near where the wire harness goes,
> though I haven't followed the wires to see if they touch each other.
>
> And as far as overheating, the coolant temp guage was running
> perfectly on dead center while the oil light was acting up. The day
> it overheated it went pretty far to right but never pegged--- and we
> were just a block from home so it was only hot for a bit.
>
> Jim
>
>
>
>>"Jim Elbrecht" <elbrecht@email.com> wrote in message
>>news:h9e1g1lk3jm0rt46ev8cq4jbcirqotmtk6@4ax.com. ..
>>
>>>I've posted before about my son's oil light problem.
>>>
>>>Comes on only when engine is fully warm and then goes off and on
>>>randomly- oil pressure checked with guage on long test drive and is
>>>marginal, but not critical.
>>>
>>>Last week his auxillary fan died. It was a mechanical failure &
>>>finally overheated the circuit bad enough to blow the 40A fuse under
>>>the steering wheel.
>>>
>>>I changed the fan and took it for a test drive this morning. No
>>>oil light. . . Ever. . . I drove and drove and drove. . . .
>>>.[maybe I'm starting to like test driving my son's Audi too much.<g>
>>>
>>>So--- Is it possible that the hot wires/circuit from the fan was
>>>cooking a transistor, resistor or some such. . .. or did I hit a wire
>>>while routing the fan cable harness? The wiring was definitely
>>>cooking before it blew the 40A fuse--- When I was testing the bad fan
>>>circuit I blew the fuse & burned my fingers when I pulled it.
>>>
>>>Thanks,
>>>Jim
>>
>
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