AE111 Wiring Fault

[gurutasker]

Hey Everyone,

Haven't really had a chance to look at it yet, but I just wanted to know if anyone else with a 1995 BZ-G Levin (Or Trueno) has had this problem.

It's to do with the rear demister switch on the dash. Have replaced it twice now on my gf's car and once on my own, thinking it was the spring release snapping, but on closer inspection this time looking at the connecter at the back it looks like something has shorted and the contacts/unit has melted

Definately a fire hazard, and it was working it's way through the 3rd one when we pulled it out.

If anyone knows anything about these post up, I will put a bit more up once I have pulled one of the rooted ones apart.

[AceSniper]

sounds abit like elc window switches the contacts get buildup from the high current aching clean them an there fine, dono if its the same for you tho

[Santa'sBoostinSleigh]

im smart eh Aaron



its inside the switch unit itself somewhere thats getting hot
one of the ones Aaron showed me was cracked and melted quite badly

disect one a take some pics as i suggested

[B1NZ]

make sure it plugged in propery, maybe its arching?

Your the only person that I've known to have had a problem with this, although the light in my hazard switch is tempremental - oh dear maybe i should check its not frying itself

[gurutasker]

oh dear maybe i should check its not frying itself

Definately worth a check mate. From first glance one of the contacts gets quite burnt (To a red like colour)... didn't have a chance to pull it apart last night, got stuck dissecting a DVD drive, proababley wont get a chance tonight either.. but eventually I will

[Alex B]

Burnt contacts should be black with carbon build up.

[NILPSI]

Mine does exactly the same thing, im on my 3rd one and its dead, the first one lasted a good couple of years, but since i got the first replacement one they have been frying within 3 days of putting it in, thats using it every morning

The switch just stops working (you push it and it doesnt click in and out), but i found that if you hold it down it works, i have been wedging a bit of cardboard in there when i really need it

[Alex B]

Well if its just due to over current throu the switch. Just use a relay.

[gurutasker]

Update onto this, I checked the Voltage and the current travelling over the circuit, and have also pulled apart a couple of the units.

Travelling between the 2 wires closest to eachother is around 12-15V and up to around 700ma, this doesn't sound like much to me, but it could be possible that it is jumping across the back or internally.

The main issue i found for the button to get stuck is the little wire/plastic combination used to bring the button in and out is getting melted/snapped by whatever is causing the heat inside the unit.

I've heard about this happening to another guy up in Auckland, so it may just be a factory fault?