Unusual electrical problem

[hudson44]

About 6 months ago my NJ Pajero 3.0lt petrol was surging. I worked out that it was surging when turning and it turns out that it only occurred when the indicators were on. After much time spent chasing the problem i ended removing the immobilizer side of the alarm as they had split into the main ignition source to the barrel so it was stepping down from 6mm wire to about 2mm. This fixed the issue until recently it has started again. I have worked out that the surging is due to the fuel pump dropping about 0.5 to 0.75v when the indicators are on. You can also hear the pump "surging" when the indicators are on. (Hazards have no effect on the pump by the way) The wire i have used to bypass the imobiliser is good so i don't think this is the issue. I'm thinking that maybe there has been some wear to the control relay contacts or a bad earth somewhere. Any thoughts on this would be great.

Gabe

[-Scott-]

That's a weird one.

I can't imagine why blinkers would create the problem, but not hazards. Have you checked a circuit diagram to see if they're off the same fuse (indicators & fuel pump?) of share a common earth somewhere?

Obviously, you've already changed your blinker fluid?

[hudson44]

Blinker fluid has been changed. I've had the control relay out, (what a prick of a spot to put that) and the blk/wht wire that is supplied from the ignition fluctuates. I've just tested the main, constant supply to the ignition switch and this fluctuates. I cannot test this with the connector undone, to test if its a supply issue or an ign switch issue, as the indicators will not work. I am in the process of finding the fusable link that supplies the ign switch. I have a funny feeling that it may be the ignition switch itself as the "start" is a bit fiddly.