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The mkiv Supra Owners Club

Car won't start! Short Circuit?


R3DG3CKO ROB

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Just been trying to wire in my rear fog lights and all of a sudden the stereo didn't work and now the car won't turn over? I think I tried it first thing this morning and worked fine (starting to doubt myself now). Was checking the lights to see if Heckler's PCB's are wired in correctly and noticed that the black wire attached directly to the ignition, going into the switch wasn't completely connected, so reconnected that and that was when i noticed the problem. The wiring has been like hat for ages, I changed the fog light switch last week but it wasn't wired in until yesterday with the PCB's

 

Any ideas what to check? Starter motor is turning over but not catching.

 

image

Edited by R3DG3CKO ROB (see edit history)
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Yeah, all looks fine. This really happened just after I wired in the second (passenger side) PCB. I've unwired everything I've done including the cigarette lighter wiring but still nothing - although if the starter motor isn't turning, wouldn't that suggest that the battery has gone flat/shorted out?

 

Only thing I haven't done is reconnect the brake light wires which were joined by the PCB

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Is there a glass fuse in the driverside footwell on your car.

 

It will be a in line fuse that screws together to make the circuit, contained in a black tube.

 

If you have one and its blown that will stop the car from starting.

 

Nb. Bad earth as pully suggested would be the next port of call, along with a battery check as Supra s really need a good strong power feed.

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Guest Chris Green

If you think the starter isn't engaging properly it might be worth testing it before you spend hours searching for a wiring issue

 

- - - Updated - - -

 

If you think the starter isn't engaging properly it might be worth testing it before you spend hours searching for a wiring issue

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I'll check the Black fuse when I get home from work and make sure I've not knocked any wires out too - It was definitely something to do with the way I wired up the rear lights as the stereo died exactly when I turned the lights on at the stalk. After that the car tried to turn over without any joy.

 

Worst part of this is that my fiance is flying in from the US on Friday and the whole point of getting all this stuff sorted was so the car is up to scratch and reliable lol looks like I might have to get a hire car at this rate :(

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OK, how do I take the black fuse out? I've tried looking at the ones in the main fuse box to see if that'd give me a clue but can't see any pinch points or clips etc. do they just pull out?

 

It unscrews counter clockwise.

 

You will find a glass fuse inside.

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It unscrews counter clockwise.

 

You will find a glass fuse inside.

 

Are we talking about the square black one? Doesn't feel like it'll unscrew without me tearing it from the box lol

 

You can see the ones I mean in the pic below, my battery is way too low to use the flash in the footwell but you can see the type I'm talking about.

 

image

Edited by R3DG3CKO ROB (see edit history)
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Ah no, that's the relays.

 

In the drivers footwell to the right, next to where your foot would be on the throttle, you may find a in line fuse behind the panel.

 

Its about an inch long with one wire in, and the same wire out the other end.

 

It contains a glass sealed fuse.

 

I know this stopped a car starting in the past.

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