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displaying posts 1 to 10 of 10
| Author | Subject: Power supply to double relay |
 Puggitt
Regular  Location: New Zealand Registered: 07 May 2012 Posts: 293 Status: Offline |
Post #1
I've been hunting down a fuel pump not priming issue and I've dot back to the double relay not being powered up. What I've got to is that pin 2 isn't getting powered and apparently is a permanent +ve which is the switcher circuit for the relay that drives the fuel pump and ignition coils. The main power for that circuit is there but because it can't switch it's not powering up.Advice please |
 Posted 18th Nov 2015 at 21:03
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demondriverdan
Seasoned Pro  Location: Londinium Registered: 29 Nov 2010 Posts: 2,665 Status: Offline |
Post #2
Have you got a Haynes manual? There's some useful wiring diagrams in there which should help you find the issue. I think I have an online copy somewhere if needed________________________________________ Rallye Race Car |
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Posted 18th Nov 2015 at 21:17
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Puggitt
Regular Location: New Zealand Registered: 07 May 2012 Posts: 293 Status: Offline |
Post #3
Yeah man got one here, using a Bosch ecu Fuel pump top right corner and associated relay is the top one. Update I've got power to pin 2 now???? But still not powering relay so the earth side mustn't be working, which it looks like that's controlled by the ecu? Is it immobiliser related? |
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Posted 18th Nov 2015 at 21:39
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demondriverdan
Seasoned Pro Location: Londinium Registered: 29 Nov 2010 Posts: 2,665 Status: Offline |
Post #4
Presume you've checked the inertia switch? That cuts power to the relay________________________________________ Rallye Race Car |
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Posted 18th Nov 2015 at 22:00
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adam b
Seasoned Pro  Location: The Nam Registered: 24 Jan 2006 Posts: 12,828 Status: Offline |
Post #5
Power to that comes from the ecu. Generally won't if you have an immobiliser or ecu fault ________________________________________ Nothing to see here |
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Posted 18th Nov 2015 at 23:01
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Puggitt
Regular Location: New Zealand Registered: 07 May 2012 Posts: 293 Status: Offline |
Post #6
adam b wrote: Power to that comes from the ecu. Generally won't if you have an immobiliser or ecu fault What would cause the ecu or immobiliser to fault? Still I paired set with correct keys etc, |
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Posted 19th Nov 2015 at 01:50
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cully
Seasoned Pro  Location: Cullompton Registered: 12 Jun 2013 Posts: 1,093 Status: Offline |
Post #7
1st side the relay is controlled by the key = fuel pump is it priming2nd side the relay is ecu controlled by the immo to see if ecu is unlocked you will need to get it on planet there is a fuse that blows that will stop the ecu i forget the number favorite issue for fuel pump not priming are fuse inertia switch burned double relay base burned double relay burned cable joints under dash (above passenger feet two loom plugs) faulty pump have you had the engine out recently or disturbed the alternator? check the second white wire is connected to the battery + at the alternator this powers the engine loom (larger ring ta  |
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Posted 19th Nov 2015 at 07:12
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Puggitt
Regular Location: New Zealand Registered: 07 May 2012 Posts: 293 Status: Offline |
Post #8
cully wrote: 1st side the relay is controlled by the key = fuel pump is it priming 2nd side the relay is ecu controlled by the immo to see if ecu is unlocked you will need to get it on planet there is a fuse that blows that will stop the ecu i forget the number favorite issue for fuel pump not priming are fuse inertia switch burned double relay base burned double relay burned cable joints under dash (above passenger feet two loom plugs) faulty pump have you had the engine out recently or disturbed the alternator? check the second white wire is connected to the battery + at the alternator this powers the engine loom (larger ring ta I've jump wired the plug and can get the fuel pump to run, so that means it's not a fuse/ inertia switch fault. Engine has been out but haven't disturbed the looms at all just undid them from the chassis leg and left them to dangle. |
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Posted 19th Nov 2015 at 08:39
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welshpug!
Capt Pedantic  Location: Bigend, Wales. Registered: 27 Mar 2007 Posts: 25,839 Status: Offline |
Post #9
have you connected the white cable to the alternator?________________________________________ need a part number? get on here - http://public.servicebox.peugeot.comBring on the Trumpets. |
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Posted 19th Nov 2015 at 10:07
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Puggitt
Regular Location: New Zealand Registered: 07 May 2012 Posts: 293 Status: Offline |
Post #10
Well I haven't removed it so I assume it's in place, but I don't like to assume, will check in a week after a trip to Rarotonga  |
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Posted 19th Nov 2015 at 19:22
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