Quote:
Originally Posted by aa909
But I noticed the volt gauge needle on the dash will wiggle back and forth about 0.3 volts when the turn signal is on (FYI the needle stays pinned at 13.5-14V at idle and 14.5V when driving without the turn signal on).
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It is either: a) Perfectly Normal; or b) The voltage regulator (VR) is having trouble keeping up with the load change of the signal filaments blinking on and off. The most common reason for voltage (and current) fluctuation at idle, causing a wiggling or "wavering" needle, in these cars is a poorly grounded voltage regulator. A lot of VR mounts on our cars are on fiberglass, which is a pretty shi**y ground. Do this test: With the engine idling, put the turn signal on and watch the needle waver. Then run an alligator clipped wire from a known good ground to one of the corner bolts that holds the VR down. If that fixes it, make the ground permanent. Try that first before we explore other alternatives.
