beaver34
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| posted on 5/8/13 at 07:16 PM |
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relay wiring
hi,
can someone clarify the wiring for a fuel pump relay as i think im going mad.
i have power from battery to fused no 30
85 to earth, 86 from on switch other side is from fuse box and 87 to the pos on the pump
nothing happens
its just a normal 30amp 4 blade relay as far as im aware, i purchased two one for each pump i run and neither are working
thanks
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Daddylonglegs
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| posted on 5/8/13 at 07:50 PM |
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Sounds OK wiring wise, if you have a multimeter check across 30-87 fro continuity when you energise the coil. If that works, try connecting 30
directly to 87 and see if the pump runs. If not then at least you can trace it from there.
HTH
It looks like the Midget is winning at the moment......
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beaver34
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| posted on 5/8/13 at 08:56 PM |
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quote:
Originally posted by Daddylonglegs
Sounds OK wiring wise, if you have a multimeter check across 30-87 fro continuity when you energise the coil. If that works, try connecting 30
directly to 87 and see if the pump runs. If not then at least you can trace it from there.
HTH
fixed, swapped 86 and 87 working fine on both now
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omega 24 v6
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| posted on 6/8/13 at 09:27 AM |
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Mmmm your originl explanation sounded fine. If swapping 86 and 87 solves the problem then 2 things spring to mind. Either your original explanation is
NOT how you wired it OR you have ( there are 2 types A and B IIRC) an odd relay where the pin configurations are NOT a std layout.
You have to watch out for these when plugging into a std wired car relay socket .
If it looks wrong it probably is wrong.
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beaver34
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| posted on 6/8/13 at 09:38 AM |
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quote:
Originally posted by omega 24 v6
Mmmm your originl explanation sounded fine. If swapping 86 and 87 solves the problem then 2 things spring to mind. Either your original explanation is
NOT how you wired it OR you have ( there are 2 types A and B IIRC) an odd relay where the pin configurations are NOT a std layout.
You have to watch out for these when plugging into a std wired car relay socket .
id been at work 12 hours before so its more than likley i confused myself somewhere along the wiring 
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Daddylonglegs
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| posted on 6/8/13 at 09:57 AM |
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I'm with Gary on that one, still at least you got it sorted
It looks like the Midget is winning at the moment......
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big-vee-twin
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| posted on 6/8/13 at 03:30 PM |
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Some relays have a diode across the coil therefore making them polarised
Duratec Engine is fitted, MS2 Extra V3 is assembled and tested, engine running, car now built. IVA passed 26/02/2016
http://www.triangleltd.com
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