Voltage Problems

[Simon Crook]

Heres one for you technical lot! when the engine is running, on tick over I have 13.7 volts at the battery and at the fuse box, when I rev the engine the battery stays the same but the fuse box goes up to 17 volts, have tried 4 voltage regulators (all about the same voltage) the voltage gauge is reading the same.

what do you think ???

[Derek Coghill]

Check the wiring; sounds like the fusebox feed has bypassed the voltage regulator somehow. Must dash, off to school.

[Paul Robertson]

As derek says wiring ,you may have the power feed where the exciter should be simon,try swapping the two end contacts around, the centre one should be the earth.

[Simon Crook]

thanks Derek/Paul will give that a go

[Simon Crook]

swapped the two wires around, lots of banging and popping through the carb (flames) so not sure if thats the problem!

[Paul Robertson]

Does the centre connection go to earth simon?

[Simon Crook]

Hi Paul yep white wire going to earth

[Paul Robertson]

The power feed to the fuse box must be unregulated then simon.Ie straight from the alternator instead of from the battery.I take my power feed from the kill switch,try that .
Paul

[Simon Crook]

Hi Paul, my fuse box same as yours, straight from the kill switch,

where should D+ wire go too incase ive done that bit wrong

[Simon Crook]

 ??? ??? ??? ???

[Trevor Williams]

Simon, Are you in the UK at the moment?
If you want to pop round one evening or at the weekend you can gave a look at the wiring in my car
Trevor

[Simon Crook]

Hi Trevor

Yep back in a Chilly Pinewood Studios at the moment, I will take you up on your offer of popping over, will mail you when I get the chance to come over.

Its a weird one, I only found out about the problem when the LED rain light decided to explode! I have change alternators, voltage regulators wiring and still have the problem!

The only thing I think it could be is where the D+ wire should go, the other two /  D- earth, DF - alternator 
thanks

Simon