stupid s13 rear defroster wont defrost

[240sxvaj]

my rear defroster on my 91 s13 fastback only works sometimes and that sometime is very rare :hahano:.
i never tried messing with it before so i know for sure i didnt mess it up. i checked out the fuse and it wasnt burnt out.

what can be wrong?

it sucks especially now since it rains like a muthafucker in so-cal.

help anyone?

[projectRDM]

The defogger timer is part of the TCU. Check for damage or burnt traces on the board.

[240sxvaj]

The defogger timer is part of the TCU. Check for damage or burnt traces on the board.


i dont think it could be burnt since it works sometimes.

but i will check it out.

i know this sounds like a easy question for some of you guys/gals but then for me im lost

Thanks

[g6civcx]

Check the connections on the glass. Sometimes these break off or are on their way to breaking off.

[240sxvaj]

Check the connections on the glass. Sometimes these break off or are on their way to breaking off.

kool, will do.

i will check it out whenever the rain clears out. sucks now since so-cal is getting flooded slowly

[yukon]

http://www.nicoclub.com/FSM/240sx/1989-90/DEFOGGER.pdf

[240sxvaj]

ok so the rain finally stop today and i checked out the TCU, fuses and it wasnt burnt.

its kinda hard for me to tell if the connections on the window is burnt because it looks kinda odd. Although the solder on the main connections, connecting to the harness does have a little of rust on it. i did clean it with alcohol but im sure that wont help.