XM Fuel Pump wiring

Unread post by **phavas** » 27 Apr 2012, 20:37

Hi,
Newbie here.
I have a 1992 2.0 liter XM, hasn't run in 12 years. Got it started with ether, then pouring fuel down the injector body. Sounds good.
Only getting 6.5 volts to the fuel pump. I have read there is a wiring loom with plugs under the LHM tank?
Can someone enlighten me about the electrical feed to the pump?

Cheers,
P.J.H.

Unread post by **citroenxm** » 28 Apr 2012, 07:15

there is a fuel pump relay on the front of the ecu box. i think its a purple one.. you could try looking in this area first for any dry or corroded connections...

Unread post by **phavas** » 28 Apr 2012, 15:37

Hi, Thanks for the quick answer. I opened the ECU box and there are 2 relays, both bluey / black. They both tested good. There are other connectors: one next to the relays I've mentioned that has nothing on it, but has yellow / white wires going into it, and I think 2 others on the opposite side of the ecu.
when I disconnected one of the relays (I think it was the right side one) something started clicking furiously on the inside right fender. Disconnecting the other produced no results. The car is a basic model: no frills, no AC, nothing. Not even a keypad for an "anti demarrage". I read somewhere that there is a cluster of wires under the LHM reservoir that some people hardwire by removing the connectors. True?

One this was a bit odd however, there is a two pin connector to the left of the throttle body (looking form the front of the car) that is disconnected. Connecting it doesn't do anything I could see, but any idea what it is?

Cheers,
PJH

addo · Unread post by **addo** » 28 Apr 2012, 23:18

Could it be an old style diagnostic plug? Also near there is the brake pressure switch (blue plug) and maybe a yellow one if XM models had traction control.

Lighty · Unread post by **Lighty** » 30 Apr 2012, 06:58

Any luck with this phavas ?
Any one shed any more light on this between you XM experts, i suggested he ask you guys ?

davetherave · Unread post by **davetherave** » 30 Apr 2012, 08:52

Post it up on the xm forum someone on there will know

Unread post by **citroenxm** » 30 Apr 2012, 09:01

i dont know much because ive never had fuel pump issues on any of mine... only one dead pump itself on a v6...

Unread post by **Peter.N.** » 30 Apr 2012, 10:07

I have had electrical problems caused by corrosion on the underside of the engine compartment fuse box.

Peter

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