matchflick

Both my interior trunk and fuel door button stopped working on the same day. I had some LED lights added to my car last week and I think it might have something to do with it. Anyone know if those switches are tied to any fuses...I looked at the fuses inside the trunk labeled fuel door and trunk lock but they were fine. The trunk is not opening with the key FOB either.

Any help would be much appreciated....

Also the tech that installed the lights did not cut any wires or anything.

Yes

Not sure if this could be it, but check the valet button inside the glovebox. I know it will prevent the trunk from opening. Not sure about the gas.

matchflick

thanks for the response...I tried that already but it was in the correct setting

redliner8

iTrader: (1)

sounds like a fuse problem since both the trunk and fuel door buttons don't work. there may be another location for the fuses besides the trunk, our cars have a few fuse boxes. i would check the one inside the passenger foot well. this one houses a lot of the fuses for functions inside the car.

VVTiBob

There is a fuse box inside the trunk, floor rear, driver's side. Pull up false floor panel, open the black cover and you'll see three columns of fuses. Top right corner (column 3 L to R) red 10 Amp fuse covers the fuel door opener switch.

VVTiBob

For the trunk release go to the passenger side junction box, (passenger kick panel below the glove box) remove the door cover and check all three MPX fuses (b1, b2 and most likely suspect b3) All three fuses are in the 2nd column (column #1 only has one fuse).

scyul

Sounds to me like he forgot to reconnect the connector behind the switches

mandyfig

Bob to the rescue! Thanks Bob.

matchflick

I checked all the fuses, pulled the switch out and made sure it was connected properly, so far everything looks good but they still arent working...

I did notice that when trying to open the trunk with the key it makes a loud beeping noise but then the trunk does not open...

VVTiBob

Where were you having the LEDs installed? The next thing I can think of will be wiring harnesses and grounds.

mrblister

Are you able to open the top with the dash switch?

rwenig

On my 2005 SC430, it is intermittent with the car off and no key in the ignition.

Sometimes the dash buttons work, sometimes they don't.

Same thing with the Key Fob to open the trunk -- when it doesn't work, I get a beep and no trunk operation.

The valet switch is set correctly -- and resetting it doesn't always seem to clear the problem.

When I start the car -- both the fuel button and the trunk button then work.

I disconnected both switches and sprayed in some electrical contact cleaner -- everything then worked for a good 10 cycles or so.

I then drove 10 miles and the problem reappeared -- I could only operate the buttons when the car was running.

Anybody have any ideas?

I tested the valet switch on an ohm meter and it was operating properly. I also shorted together the wires on the valet switch -- and the problem was still there.

I see some people talking about adding an extra ground wire? Where is this done?

Thanks,

Robert

VVTiBob

VVTiBob

VVTiBob