Power Seats/Rear Window Defroster Relationship? - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 03-25-2004, 12:11 AM   #11
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Check to see if the breaker right above it is the same, and then you can temporarily switch them.
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Old 03-25-2004, 11:26 AM   #12
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Quote:
Originally Posted by compyelc4
I think I may have a weak relay #4.
Circuit breaker, not relay...

Quote:
I think the rear defogger is tripping the relay and then both rear and seats don't work as a result. When its warmer there is less voltage load to trip out the breaker so everything works fine.

Does anyone know if there is a duplicate #4 breaker in there somewhere so I could trade one out to see what affect that has?
Circuit breakers are rated in amps like fuses, so you could swap in another of the same rating (i.e. another breaker, not a fuse) as a test, assuming it'* not needed for some other vital function.

One other possiblity I hadn't thought of before: Do the power seats work anytime, _until_ you press the defogger (or vice-versa)? Maybe there'* a short in one branch that'* downstream of the control switch, so that it doesn't blow the breaker until you try to use that accessory.
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Old 01-20-2007, 05:30 PM   #13
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I have this problem too.... this is an old post, but curious to see if anyone has found anything about it.... I am gonna go tear out my passenger side seat.... the pump isn't working and i have the same conditions as this one.

I hit the rear defog button and within a few seconds, i have no power to my seats or my locks. I shut it off, within a few minutes i have power again. Circuit breaker gets HOT.

It sounds like a short... just where and what all is in the circuitry would be nice to know... anyone with a FSM for 92 that wants to lend a hand??
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Old 01-20-2007, 05:52 PM   #14
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Are you referring to the fuel pump? If so check the ground bus on the driver'* side.
Here'* a Tech info article.
http://www.bonnevilleclub.com/forum/...=article&k=102
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Old 01-20-2007, 05:54 PM   #15
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Please do not dig up old threads. If you have a similar problem such as this, start a new thread linking it to the old one for reference.
Thank you.
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Old 01-20-2007, 06:19 PM   #16
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I don't think this is the one I need.... the FP is fine (seems to be) but the typical door locks/power seats/and rear defogger. I guess I would like to find the wires for the defogger and where the heck they run. THANKS!!
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