Thread: Electric Seat Question.

Originally Posted by mike 90 RR

Cheers for this thread Dougal ....

My "RRC Soft dash 1995" symptoms was the drivers mirror moving randomly ... I disconnected the mirror plug ... That was 6 months ago

So today i was inspired by this thread to get at that ECU ...

NOPE ... Had the seat unbolted >> Layed against the rear seat to expose the ECU box >> unclipped the plugs >> box out >> board removed >> unsolder the battery >> clean the corrosion >> Clear sealed the board >> Reassemble box >> install all parts and refit the seat

All works ... and all done in a casual 2 hours

Cheers
Mike

It took over an hour just to fix the circuit board on mine. With an electronics tech we pulled the battery and darlington chip. Cleaned it all, soldered wire over the 3 tracks that no longer exist, replaced a cap that didn't survive surgery and put the darlington chip back on with a socket in-case it was buggered. But it wasn't.

I still haven't put a battery case on, flyleads have been soldered so a battery box can be screwed on outside the case with 3x rechargable AA's. But the drivers seat now adjusts like it should.
Passengers seat it still dodgy (reclines but won't incline), I should start looking at the switches on that one first. My mirrors don't adjust, but the smashed ignition circuit may have something to do with that.

I've got the new ignition lock for the same car, took about an hour to rekey it, about an hour to get the old one off and I've got a dodgy alarm install to contend with as well. The alarm was wired into the ignition on the wrong side of the plug.

So that's drivers seat working properly with the repaired board. I haven't re-instated a battery pack as no-one sells 3xAA holders anymore. Dick Smith electronics just sell TV's and iphone cables, Jaycar don't either. So I've ordered from Dealextreme.

The passengers seat was also dodgy, but it has no brains and relies directly on the switches. I pulled the switches (which required hotwiring and unbolting the seat), stripped the very intricate switch block and scraped all the contacts clean.
That is also now working as it should.

Mirrors are next. They would adjust through the drivers seat before, but now nothing.

Originally Posted by Dougal

Mirrors are next. They would adjust through the drivers seat before, but now nothing.

Mirrors are now good. I think they needed power through the ignition circuit which came right when I replaced the smashed steering lock.

Took mine out today after reading this thread.
Battery has indeed leaked. Not sure if its saveable or not but got nothing to lose by trying! My drivers seat and mirrors do not work at all

Get that battery off and start cleaning.

Got the battery off


Removed the corroded chip number 1




Removed a blown capacitor



Cleaning up



Help from my electrical guru.....seems she knew this was important work going on in front of her....first time ever she's not decided to play with wires!?


Need to pick up 2 more resistors tomorrow after work then clean up a bit more and do some track repairs and fingers crossed itl work!

After all the effort, mines stuffed
Had to switch over to using relays, but least its working, and I managed to fit them all into the original ecu box so it looks OEM still!

Originally Posted by fonfe

After all the effort, mines stuffed
Had to switch over to using relays, but least its working, and I managed to fit them all into the original ecu box so it looks OEM still!

Still good news. The original board is just darlingtons and relays anyway. Ignoring the memory function that is.
I think I'll leave the memory out of it. I know friends who've broken stuff with electric memory seats.

On the passengers side mine simply had dirty contacts. A strip and clean got that one working fine.