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The mkiv Supra Owners Club

Power windows not working


ALG JOT

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So i’ve used the search functions and tried everything i have read that is similar to the issues i have researched. 
 

- I have put power directly to both motors and they work.

- I have confirmed power to 30amp door fuse that supplies the main relay in the footwell fuse box.

- I have ran power straight to the main relay ‘pin 3’ in the footwell and confirmed wiring to master switch and passenger switch works and powers the windows. 

- Door locks work fine. 

But i do not have power from ‘pin 1’ of the main relay to switch the relay. 
i have seen the feed comes from the ‘Theft deterrent and door lock control ECU’ but would i be right in guessing that an aftermarket alarm would have replaced this?

If so my guess is my alarm is just old and wiring a bit knackered and hope newer alarm would rectify this. I’ve been meaning to update the old laserline anyway 😅
 

 

Edited by ALG JOT (see edit history)
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