Wednesday, May 11, 2005 at 17:12
Hi Hugh,
I had exactly the same problem before I fitted the earth straps.
Only noticed it at night ( lights on ) with the camper attached, never bothered too much about it.
When we bought our new camper ( Jayco Dove Outback ) it had extra lights, like front and side clearance lights.
Well on our first night trip with the new camper my main fuel guage dropped by over 3/4 tank and the sub guage dropped by over 1/2 tank.
I was certainly concerned now because I could not rely on the fuel guages at all.
So when I started looking at the problem I found that the earth from the 7 pin brylite connector went to the chassis rail,
well I thought, this should be a good earth.
Well was I wrong, I found I had nearly a 4 volt drop with the tail and clearance lights on. So on further investigation I found as you did, the chassis is not earthed to the battery, motor or body. Soon fixed this with an earth strap from the engine block to the chassis and one from the body work to the chassis.
No problems now.
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