Join Date: Mar 2008
Feedback Score: 0 reviews
How did you install the manual switch - the "correct" thing to do for a solid-state controller would be to just leave the controller as is, but add a ground wire from the post where the small white wire connects to, run the ground wire through the firewall, to a switch, and the from the switch to a good dash ground. Reason for this is the relay receives key-on 12V from the ignition, the controller itself (black box under relay) only grounds the relay through that small white wire and allows it to close the big circuit and power the glowplugs, so with that manual grounding switch you'll be just duplicating the controller action.
Also, glowplugs should be on for no more than 15 seconds, I've had my truck fire up on 6 glow plugs running for 10 seconds on a cold summer morning, so 15 seconds on 8 good glowplugs should be plenty heat to get yours going. Who told you to keep the glow on for 30-40 seconds? I think you're better off to take anymore diesel advice from them with extreme caution...