Electrical nightmare, 1968 cluster lights, parking lights, horn, etc.
The following electrical gremlins have been torturing me for over a month now, and I've been searching out old threads for research and troubleshooting but I'm finally stumped and starting a new thread.
- I can't get the instrument cluster to illuminate in a 1968 Rallye Dash --- 4-17-17 I'm an idiot and was turning the knob the wrong way, fixed.
- Parking/running lights illuminate in position 1, then the front signal bulbs go very dim when position 2 turns on the headlamps. --- 4-17-17 it was a bad flash pot (new electronic 2-post type w/ a ground wire).
- Turning the rheostat occasionally changes the brightness of the parking lamps, but they are never "bright" when headlamps are on, regardless of signal lever position. --- 4-17-17 fixed with new flash pot.
- Horn intermittently works, the volume varies --- 4-15-17 fixed with forcing better grounds at horns & column.
- Signal lights were previously not working but that was fixed this morning with a new cam
------1st Issue details------can't get the instrument cluster to illuminate in a 1968 Rallye Dash
-All bulbs are new, no difference with swapping the OEM bulbs for LED
-All the gauges function properly
-Signal indicators in the dash work.
-I have added extra grounds to the cluster, dash, steering column, and at the parking lamps.
-There is power on the orange wire at the cluster (clock connector) and at the fusebox. Power reads only 6V, is that normal for the gauges?.
-All the connections are good and clean
-No [aftermarket] splices or burn through in the under-dash harness
------2nd Issue details------Parking/running lights illuminate in switch position 1, then the front signal bulbs go very dim when position 2 turns on the headlamps
-All bulbs are new, no difference with swapping the OEM bulbs for LED
-Hazards work when headlamps are off or in park.
-Flash pots are both new
-I have added extra grounds to the cluster, dash, steering column, and at the parking lamps.
-Brake lights and rear signal lights function properly in any switch position.
-All the connections are good and clean
-No [aftermarket] splices or burn through in the under-dash harness
------3rd Issue details------front parking/running lamps are not bright when headlamps are on
-Headlamp switch is a new NAPA unit. 3 original light switches/rheostats made no difference with the instrument lights.
-I have replaced the signal cam
-Brake lights and rear signal lights function properly in any switch position.
-All the connections are good and clean
-No [aftermarket] splices or burn through in the under-dash harness
-Forward light harness/engine bay wiring is all new and properly grounded.
------4th Issue details------Horn intermittently works, the volume varies
-Horns were bench tested and work
-Horn relay is new and works (audible when button is pressed), possible bad ground at horn?
