BRC LPG system elctrical woes?

Rudy · Post by **Rudy** » Mon Mar 12, 2012 5:42 pm

Hi everyone

New to this forum and hoping to get some much appreciated help.

I have a Lexus Ls400 with a BRC system. Recently the fuel level indicator lights have been going out every time I hit a bump or pothole. Then slowly come back on 1 by 1 and it switches over to LPG again until the next bump....

I suspect a dodgy connection somewhere. Anyone know where I can start looking?

ChrisJC · Post by **ChrisJC** » Mon Mar 12, 2012 9:17 pm

There'll be a sender on the tank, with two wires (probably green and black). The black one can be grounded anywhere from near the tank (the tank itself shouldn't be used as ground!!), and the green one will run to the front end somewhere.

Check them out.

Chris.

Rudy · Post by **Rudy** » Mon Mar 12, 2012 9:27 pm

Thanks for that Chris.
I'll have a look in the morning.

Do you happen to know if the car actually switches back to petrol when the lights go out, or it's just the lights being funny?

softdash3.9 · Post by **softdash3.9** » Mon Mar 12, 2012 9:50 pm

Some lpg systems can be programmed to switch to petrol when the tank is low, I could do this with my system (Bigas) on my range rover classic, but it was a pain as it would switch over and back to lpg with the gas sloshing about in the tank, so I disabled the feature.

Would think you have a wiring/short issue or defective level switch.

The low level switch is (in my case) a reed switch & magnet

Rudy · Post by **Rudy** » Mon Mar 12, 2012 10:47 pm

I don't think it's the level switch. When driving on a road with no bumps, holes etc. it's perfectly fine.

Rudy · Post by **Rudy** » Tue Mar 13, 2012 11:38 am

update:

I have unplugged and plugged back various connections, took it for a 60 mile round trip this morning, and the issue was gone. Hopefully it was just a dodgy connection somewhere and reseating several plugs etc has fixed it.....