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Next: Focus - unpleasant noise / feel through steering.
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External
Since: Mar 31, 2004
Posts: 29
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(Msg. 1) Posted: Mon Oct 22, 2007 5:29 pm
Post subject: Strange electrical problem - '91 Dakota
Archived from groups: alt>autos>dodge>trucks (more info?)
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First thing the other morning, the Brake Warning light (red one, not the
ABS one) came on and the blower wouldn't blow.
When I turn the blower switch off, the brake light goes off.
Also, in reverse, the reverse lights don't work, and the same brake
warning light goes on.
I notice in the wiring diagram, that the blower motor & reverse lights
get power from the same point on the ignition switch.
But I don't see the connection to the brake light.
I assume I've got a bad connection or ground somewhere, where to get
started? |
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External
Since: Aug 09, 2006
Posts: 215
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(Msg. 2) Posted: Sat Oct 27, 2007 12:21 am
Post subject: Re: Strange electrical problem - '91 Dakota [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Sounds like a bad ground somewhere; instead of the current going to ground
through the normal/correct route, it's backfeeding into the common power
source. I would start by inspecting the ground at the brake lights, only
because they are probably more susceptable to corrosion. Next I would check
the blower circuit. If you don't find a bad ground at either location,
inspect the ground for every component shared by the common power source.
I've seen really weird things happen from a bad ground...
"Bruce Porter" <b.a.porter.RemoveThis@att.net> wrote in message
news:c65Ti.12889$kj1.7829@bgtnsc04-news.ops.worldnet.att.net...
> First thing the other morning, the Brake Warning light (red one, not the
> ABS one) came on and the blower wouldn't blow.
> When I turn the blower switch off, the brake light goes off.
> Also, in reverse, the reverse lights don't work, and the same brake
> warning light goes on.
> I notice in the wiring diagram, that the blower motor & reverse lights get
> power from the same point on the ignition switch.
> But I don't see the connection to the brake light.
> I assume I've got a bad connection or ground somewhere, where to get
> started? |
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External
Since: Mar 31, 2004
Posts: 29
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(Msg. 3) Posted: Thu Nov 08, 2007 5:19 pm
Post subject: Re: Strange electrical problem - '91 Dakota [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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The blower motor was old and drawing too much current.
It fried the ignition switch & it's wiring harness.
Ed H. wrote:
> Sounds like a bad ground somewhere; instead of the current going to ground
> through the normal/correct route, it's backfeeding into the common power
> source. I would start by inspecting the ground at the brake lights, only
> because they are probably more susceptable to corrosion. Next I would check
> the blower circuit. If you don't find a bad ground at either location,
> inspect the ground for every component shared by the common power source.
>
> I've seen really weird things happen from a bad ground...
>
> "Bruce Porter" <b.a.porter DeleteThis @att.net> wrote in message
> news:c65Ti.12889$kj1.7829@bgtnsc04-news.ops.worldnet.att.net...
>
>> First thing the other morning, the Brake Warning light (red one, not the
>> ABS one) came on and the blower wouldn't blow.
>> When I turn the blower switch off, the brake light goes off.
>> Also, in reverse, the reverse lights don't work, and the same brake
>> warning light goes on.
>> I notice in the wiring diagram, that the blower motor & reverse lights get
>> power from the same point on the ignition switch.
>> But I don't see the connection to the brake light.
>> I assume I've got a bad connection or ground somewhere, where to get
>> started?
>>
>
>
> >> Stay informed about: Strange electrical problem - '91 Dakota |
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External
Since: Nov 08, 2007
Posts: 106
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(Msg. 4) Posted: Thu Nov 08, 2007 5:34 pm
Post subject: Re: Strange electrical problem - '91 Dakota [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Sounds to me like someone oversized a fuse as well.
--
If at first you don't succeed, you're not cut out for skydiving
"Bruce Porter" <b.a.porter.DeleteThis@att.net> wrote in message
news:fyHYi.6593$if6.825@bgtnsc05-news.ops.worldnet.att.net...
> The blower motor was old and drawing too much current.
> It fried the ignition switch & it's wiring harness.
>
> Ed H. wrote:
>> Sounds like a bad ground somewhere; instead of the current going to
>> ground through the normal/correct route, it's backfeeding into the common
>> power source. I would start by inspecting the ground at the brake
>> lights, only because they are probably more susceptable to corrosion.
>> Next I would check the blower circuit. If you don't find a bad ground at
>> either location, inspect the ground for every component shared by the
>> common power source.
>>
>> I've seen really weird things happen from a bad ground...
>>
>> "Bruce Porter" <b.a.porter.DeleteThis@att.net> wrote in message
>> news:c65Ti.12889$kj1.7829@bgtnsc04-news.ops.worldnet.att.net...
>>
>>> First thing the other morning, the Brake Warning light (red one, not the
>>> ABS one) came on and the blower wouldn't blow.
>>> When I turn the blower switch off, the brake light goes off.
>>> Also, in reverse, the reverse lights don't work, and the same brake
>>> warning light goes on.
>>> I notice in the wiring diagram, that the blower motor & reverse lights
>>> get power from the same point on the ignition switch.
>>> But I don't see the connection to the brake light.
>>> I assume I've got a bad connection or ground somewhere, where to get
>>> started?
>>
>>
>> >> Stay informed about: Strange electrical problem - '91 Dakota |
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External
Since: Aug 09, 2006
Posts: 215
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(Msg. 5) Posted: Thu Nov 08, 2007 11:56 pm
Post subject: Re: Strange electrical problem - '91 Dakota [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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I'm glad you found the problem. Thanks for the update.
"Bruce Porter" <b.a.porter RemoveThis @att.net> wrote in message
news:fyHYi.6593$if6.825@bgtnsc05-news.ops.worldnet.att.net...
> The blower motor was old and drawing too much current.
> It fried the ignition switch & it's wiring harness.
>
> Ed H. wrote:
>> Sounds like a bad ground somewhere; instead of the current going to
>> ground through the normal/correct route, it's backfeeding into the common
>> power source. I would start by inspecting the ground at the brake
>> lights, only because they are probably more susceptable to corrosion.
>> Next I would check the blower circuit. If you don't find a bad ground at
>> either location, inspect the ground for every component shared by the
>> common power source.
>>
>> I've seen really weird things happen from a bad ground...
>>
>> "Bruce Porter" <b.a.porter RemoveThis @att.net> wrote in message
>> news:c65Ti.12889$kj1.7829@bgtnsc04-news.ops.worldnet.att.net...
>>
>>> First thing the other morning, the Brake Warning light (red one, not the
>>> ABS one) came on and the blower wouldn't blow.
>>> When I turn the blower switch off, the brake light goes off.
>>> Also, in reverse, the reverse lights don't work, and the same brake
>>> warning light goes on.
>>> I notice in the wiring diagram, that the blower motor & reverse lights
>>> get power from the same point on the ignition switch.
>>> But I don't see the connection to the brake light.
>>> I assume I've got a bad connection or ground somewhere, where to get
>>> started?
>>
>>
>> >> Stay informed about: Strange electrical problem - '91 Dakota |
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External
Since: Mar 31, 2004
Posts: 29
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(Msg. 6) Posted: Mon Nov 12, 2007 9:55 am
Post subject: Re: Strange electrical problem - '91 Dakota [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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