Help! Electrics and circuit breaker

[Mike K]

hi


First : check that the battery terminals are clean and the lead connections are clean and making good contact . They often gum up after a while, give the terminals a clean .

Sounds like a bad connection somewhere . Give the terminals on the solenoid a clean as well . If that doesnt work, try by-passing the solenoid with a jumper lead across the large lead terminals on the solenoid.

Mike

[Lauren Child]

Originally Posted by Mike Kelly

hi


First : check that the battery terminals are clean and the lead connections are clean and making good contact . They often gum up after a while, give the terminals a clean .

Sounds like a bad connection somewhere . Give the terminals on the solenoid a clean as well . If that doesnt work, try by-passing the solenoid with a jumper lead across the large lead terminals on the solenoid.

Mike

I've given the terminals a good clean, but no joy. Had electrics back fine for lights etc. but everything dead again after pushing the starter button and hearing the click.


Well that's wierd - looking at the circuit diagram in MB-F1 the circuit breaker only operates on the lights.

[Mike K]

Lauren

There isn't a circuit breaker on the starter motor circuit itself . Still sounds like a bad connection somewhere , corrosion on a terminal maybe . The starter motor draws massive amps from the battery , the battery voltage will drop significantly while the starter is turning over .

Try wiggling the solenoid connections e.g., the thick leads on it . You may have to loosen the nuts a bit to wiggle the leads .

Mike

[Richard Farrant]

Hi Lauren,
As Mike says, check battery connections, but also check the connection of the earth lead from battery to chassis, and the earth lead from chassis to engine, these are often overlooked and the biggest sources of problems.