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The mkiv Supra Owners Club

Integration relay ??


GRIM

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Hi guys

 

can anyone tell me how can I check an "integration relay"

 

my key ring light doesn't work neither does the foot light

 

I have checked the fuses and they are ok

dome light works

 

I have searched the threads and it seems that an integration relay is my problem

but want to be sure before I buy that thing

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Looking at the wiring diagram, the dome fuse provides 12 volts to both the integration relay and the ignition barrel LED, and the integration relay provides the negative when required. It appears as though the same negative is used to trigger the personal light (interior light). If you are saying the interior lights work as far as I can see, the integration relay is working correctly.

 

If the footlights (LED's) are OEM they will most probably be wired from the ignition barrel connector. It might be worth checking this connector just under the steering column (my money is on a loose connection).

 

Hope this is of some use to you.

Edited by Kev.O (see edit history)
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that's def-ly helpful

 

thanks ;)

 

yes sir, the footwell light is wired from the ignition barell connector and has its own 1A fuse

 

there was a small 1A fuse under the steering column just for the footwell lights which was burnt (that day, ignition barrel led worked, just no footwell light)

I replaced the fuse with the same type 1A fuse, after that everything worked but in about 5 second the ignition barrel as well as footwell lights turned off, that small 1A fuse was OK

there're also no lose connections as I took everything apart

all the fuses are ok

 

I don't know what else I can check

Dome(interior) lights still work

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the footwell lights are OEM

 

I tried to disconnect it but it was too late

 

I think there was a short somewhere in the footwell harness :(

 

I'm removing and making a new harness for the footwell lights anyway

 

but ignition barrel still doesn't work :(

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The footwell lights use a male and female OEM connector so can be easily disconnected.

 

Are you able to check the voltage with a meter? As far as I can see if the interior lights are working on the door switches then the integration relay is working so the issue must be between the relay and the ignition barrel LED.

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thanks for the replies sir

 

yes, I've seen those white oem connectors

I'll check the voltage tomorrow and will reply with results and some pictures

 

also will try to follow the wires to see maybe there's a fuse somewhere (but from what I remember, when I looked for the fuse last time the red power wire was going to the engine bay)

 

do you know if there're any more fuses?

 

as I understand that integration relay gives a ground! and the power is constant, right?

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Yes correct a constant positive and switched negative. I'm not sure why there is a wire going to the engine bay.

 

I recently removed an OEM footwell loom and it simply just connected into the white connector and had an inline fuse. It might be that at some point someone decided to use the power from else where. If the footwell lights are just LEDs I can't see the extra power causing an issue and would use the ignition barrel power.

 

The dash wiring plugs into the drivers side fuse board and goes direct to the steering column.

 

Yes a few pictures might help. Good luck.

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