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The mkiv Supra Owners Club

Heater and wiper issue


iainc

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Currently have a weird fault on a supra turbo (not mine).

 

When heaters are on they work fine, untill the wipers are switched on then the heaters cut out till the wipers are switched off, then the heaters come back on.

 

I have checked stalks and heater control on my car also checked fuses. only fault visable is that there is no intermittent.

 

Any help appreciated.

 

Iain

Edited by iainc (see edit history)
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sounds like an earth fault, looking at the wiring diagram check the ones that are bolted to the front wings, i can not tell you exactly where they are, the wiring diagram just says front fenders, at the very front i belive, let me know how you get on, regards chris.

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found it iainc so you can download it for yourself, i will still send if you want me to, when you look at the diagram you can see that the heater and wipers use "1B" earth point, i had a similar problem on a renault megane, just a thought try runing a seperate temp earth to wiper and or heater earth wires in the car to see if this cures your problem. let me know how you got on, regards chris,

 

the site http://www.turbosupras.com/pages/pages/technical/jza80/a80tsrm.htm

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cheers for that chris.

 

just waiting for him to bring car round to carry on looking for fault, just hoping he has settled his missus down as she is kicking off cause it dosnt work properly. will let you know how i get on.regards iain

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