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melted toggle switch
beaver34 - 4/8/13 at 03:06 PM

cars melted a 25a toggle switch, not had this happen before, however it is the main fuel pump switch

i presume this needs to run through a relay and not just a toggle switch to stop this happening again or do i need to look further into the wiring

thanks

scudderfish - 4/8/13 at 03:08 PM

Was that DC or AC rated? AC switches can't take anywhere near the same current DC.

scudderfish - 4/8/13 at 03:10 PM

iank - 4/8/13 at 03:16 PM

If the fuse on the fuel pump is less than 25A then I'd be checking the switch rating (DC current as above)

beaver34 - 4/8/13 at 05:04 PM

quote:
Originally posted by scudderfish
Was that DC or AC rated? AC switches can't take anywhere near the same current DC.


it dosnt say, will running a relay solve this issue? or do i need a more man toggle switch as such?

matt_gsxr - 4/8/13 at 05:08 PM

Relays are rated for DC so should be fine.

snowy2 - 4/8/13 at 05:49 PM

relay...that is the reason why the donor car had a relay....easy peasy to fit....
a quick and easy method to fit is to put it behind the dash where your switch is. Cut the wire that goes to the pump and put a spade connection on it connect this to pin 85 on a 4 or 5 pin relay and connect pin 86 to earth......take the other end of the cut wire (from the switch to pump...) and fit a spade terminal to it and fit to pin 87 on a 4 pin relay (and the same on a 5 pin NOT 87a!) pin 30 on the relay needs a power supply from a suitable place and it needs a 30A fuse........
should sort your problem.

[Edited on 4/8/13 by snowy2]