defender TD5 fuel pump relay buzzing

taftaf944 · Dec 20, 2010

Hi all
My wife went out today to jump start a friends car, our TD5 running fine she puts the jump leads on, accidently shorts out the positive

, the engine dies, when you now turn on the ignition the fuel pump relay buzzes like its going crazy, it turns over fine but does not start, i have changed the relay its fine so i shorted pin 30 to 87 on the relay plug which should set the fuel pump to permanant pump, still nothing just wondered if it had been heard of before?

Cheers Taf

sible88 · Dec 20, 2010

Sounds like u need new pump or you have ****ed the ECU ohh dear

Shifty1962 · Dec 20, 2010

The fuel pump will be fine. It sounds like the immobiliser sensed the short as a disconnect and has partially set itself.

I'd try a reset of the ECU.
before you do this make sure you have any radio codes to hand as you will need to enter them.

You need to turn the key to pos II (until the dash lights come on) then turn it off again and disconnect the batt +ve cable within 15 seconds. Make sure you dont have any other +ve feeds coming from the battery that could still back feed the ECU. Ignore your alarm (if you have one) that will sound for 30 seconds or so using its own battery.
Wait for a minute or two then reconnect the battery +ve cable. Turn the key and see what happens.

Good luck.

buckshot · Dec 20, 2010

Shifty1962 said:
The fuel pump will be fine. It sounds like the immobiliser sensed the short as a disconnect and has partially set itself.

I'd try a reset of the ECU.
before you do this make sure you have any radio codes to hand as you will need to enter them.

You need to turn the key to pos II (until the dash lights come on) then turn it off again and disconnect the batt +ve cable within 15 seconds. Make sure you dont have any other +ve feeds coming from the battery that could still back feed the ECU. Ignore your alarm (if you have one) that will sound for 30 seconds or so using its own battery.
Wait for a minute or two then reconnect the battery +ve cable. Turn the key and see what happens.

Good luck.

good tip shifty

worth knowing might even write that down incase i needs it

Allan white · Nov 4, 2012

Did you get to the bottom of your problem I have a problem which sounds the same my defender will turn over but is buzzing from the relay and I have no engine management light or heater light on the dash board.

fatmaximus · Nov 21, 2012

Same problem here. Any results?

Eire · Nov 12, 2023

Allan white said:
Did you get to the bottom of your problem I have a problem which sounds the same my defender will turn over but is buzzing from the relay and I have no engine management light or heater light on the dash board.

Hi Did you solve this issue , I have exactly the same problem?

defender TD5 fuel pump relay buzzing

taftaf944

New Member

sible88

New Member

Shifty1962

Well-Known Member

buckshot

Well-Known Member

Allan white

New Member

fatmaximus

New Member

Eire

New Member

Similar threads