yamman35 Posted March 15, 2016 Share Posted March 15, 2016 I have a 1999 TD5 defender with a pump problem. When the ignition is turned on, the fuel pump relay does not energise.Then I manually close the fuel pump relay the pump starts. So the fuel pumps works correctly.I get 12v on pin 86 of the relay when the ignition is on. (between chassis and pin contact and between pins 85 and 86).I have checked continuity between the relay pin 85 and the ECU connector, the blue and purple wire.The main relay and inertia switch are ok.If I short out the relay to start the pump the engine still won't start.Am I looking at a new ECU or can there be another problem. Quote Link to comment Share on other sites More sharing options...
steve200TDi Posted March 17, 2016 Share Posted March 17, 2016 Do you get 12v down the signal wire when you put the ignition on? I had heavy corrosion in one of the wires which causing a huge resistance down the wire. I take it that the vehicle was working fine before you had pump problems. Steve Quote Link to comment Share on other sites More sharing options...
pigster Posted March 17, 2016 Share Posted March 17, 2016 immobiliser.. maybe. as that on my one when the alarm was messing me about due to a flat battery in my key fob didn't let me start the engine -with or without the pump being on. Quote Link to comment Share on other sites More sharing options...
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