Hello, Healeyphiles -
This is an MG Midget, but the wiring is similar to a Healey. I cannot
figure this one out. The situation:
1. I am reassembling the car after a total repaint.
2. During disassembly, the molded plastic connectors in each of the
headlamp harnesses crumbled, so I replace both harnesses with new ones from
Moss.
3. Because the headlamps were mis-matched and one had no high beams, I
replaced both headlamps with new ones. (NOTE: the left lamp high beam did
not work in the car with the old harness, but I just checked the bulb
directly to the battery and both beams worked).
4. I drove the car to a location where I could adjust the headlamp aiming
according to instructions at danielsternlighting.com. Both lights worked on
both high and low beams.
5. When I finished the aiming procedure, I turned off the headlamp switch
before starting the car to drive home. That's the last I have seen of
either the high or low beams. Fortunately, it was not too dark to see and
less than a half-mile to home down a neighborhood street.
6. I have checked the headlamp wiring end-to-end per the BMC wiring
diagram. With the headlamp switch on, I have 13 volts at all locations
checked: headlamp switch blue wire to turn signal switch (power input),
turn signal switch blue/white wire (high beam circuit), turn signal switch
blue/red wire (low beam circuit), 13 volts to both circuits at the headlight
connector of the new harness (since neither light is working, I am only
troubleshooting the right one so far).
7. Continuity of ground at the headlight connector.
8. The light (both high and low beams) burns brightly if I connect its
terminals directly to the battery. I also plugged in both the old bulbs,
for what that's worth, and neither of them worked.
So, the new headlamp is good, I have 13 volts at both high and low beam
terminals of the new harness and continuity of ground. I can also measure
13 volts on the lamp terminals with it plugged into the harness. What is
the problem?
Thanks for any suggestions!
Steve Byers
HBJ8L/36666
BJ8 Registry
AHCA Delegate at Large
Havelock, NC
TARHEELY license plate
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