Check to see if the breaker right above it is the same, and then you can temporarily switch them.

Circuit breaker, not relay...

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.

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??

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

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.

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!!