Re: 6v halogen headlights
Posted by HH56 On 2016/4/22 9:39:25
As Kev says, at fast idle the voltage should be 7.2-7.4 volts and that will be measured thruout the system. You should be able to measure close to that at the headlight junction block on the L fender. Engine off and voltage should revert to battery level of 6.3v give or take.
No matter which headlights are used - original or halogen - I am a believer in using relays to take the stress of the high current the headlights pull out of the old headlight and dimmer switches. If a switch is dirty or perhaps making marginal contact, in addition to reducing voltage available to lights, the high current causes the switches to heat and before long there are other issues.
I make a small assy and place a couple of relays near the junction block. A couple of minor wire changes at the terminal strip lets the original wiring operate the relays and current for the headlights is delivered thru a new 10 ga wire and circuit breaker directly from the battery connection at solenoid. That eliminates the current having to go thru switches and several feet of smaller gauge wire. The only original wiring still carrying much current is that in the rubber cables between junction block and headlights. With a change of relays the same circuit works on 12v cars too although there are other considerations with the dual terminal strips and wiring on 55-6 cars.
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No matter which headlights are used - original or halogen - I am a believer in using relays to take the stress of the high current the headlights pull out of the old headlight and dimmer switches. If a switch is dirty or perhaps making marginal contact, in addition to reducing voltage available to lights, the high current causes the switches to heat and before long there are other issues.
I make a small assy and place a couple of relays near the junction block. A couple of minor wire changes at the terminal strip lets the original wiring operate the relays and current for the headlights is delivered thru a new 10 ga wire and circuit breaker directly from the battery connection at solenoid. That eliminates the current having to go thru switches and several feet of smaller gauge wire. The only original wiring still carrying much current is that in the rubber cables between junction block and headlights. With a change of relays the same circuit works on 12v cars too although there are other considerations with the dual terminal strips and wiring on 55-6 cars.
Attach file:
(96.21 KB)
(62.76 KB)
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