Sensitive Fuel Gauge

barryboy · Post by **barryboy** » Wed Nov 28, 2007 2:31 pm

My fuel gauge has been playing up - yes, I've read all the posts and at some stage plan to investigate the 'dodgy earth' issue.

But yesterday, when one of my kids sat in the back, and then turned on the rear blower/heater, the gauge suddenly went from nearly empty back up to 3/4 full, which is where it should have been.

Any ideas how the heater/blower and/or its controls could have affected the level transmitter?

Post by **Ian** » Wed Nov 28, 2007 5:24 pm

I'd suggest the most likely explanation is that the wires behind the dash (which are notorious for poor insulation) have been disturbed, and one wire is brushing against another one. This can happen if a new speedo, speedo chip or even a radio/CD is installed.

madmile · Post by **madmile** » Wed Nov 28, 2007 9:20 pm

It is possible an earth problem - I think (not 100%) that the wiring for the heater controls goes into the same loom as the fuel sender.
The easiest way to add another earth is to tap a wire off one of the holes in the rim of the tank and add the other end to one of the bolts already in the cill area.
No guarantees, as I have just replaced a sender unit

.

The Great Pretender · Post by **The Great Pretender** » Thu Nov 29, 2007 12:14 am

Easy one..................leave the kid in the seat..............nuff said?......

ps, dont tell the wife

mikeonb4c · Post by **mikeonb4c** » Thu Nov 29, 2007 1:58 pm

madmile wrote: No guarantees, as I have just replaced a sender unit .

Someone was selling a sender unit on ebay a few days back. Waycar8 my still have his for sale too.

I'll fetch me coat