by cougar » Sun Jun 15, 2014 9:58 am
What typically causes this is a low reference voltage into the voltage regulator. A common place for this to occur is in the ignition switch, but could be anywhere in the feed between the battery and the regulator. The best plan is to 1, replace the ignition switch and 2, install a relay that will take the regulator power off the ignition switch and take it straight from the battery.
RIP 91.5 W250 5 speed. The great experiment.
92 W250 HD 47RH with Compushift. Upgraded H1C to 62/60/16, Scheid Lightning VE, 60# valve springs, DAP 7X.010 injectors, 4" DE exhaust, home made cooler tubes.
01 2500 "the work truck".