Re: Henry's 37 Limousine
Posted by HH56 On 2017/2/7 12:45:40
You can do that if you want an added switch but to have the single headlight switch controlling both, here is a quick schematic of what I would do --- provided the HL switch has two independent outputs at pos 3 and 4 and 3 stays on when pos 4 is selected. You would have to verify that is the way it works for this schematic to work.
The existing headlights would be fed from position 3 of HL switch by removing the jumper or whatever connection you made between position 3 and 4. All of the remaining headlight wiring would stay as is so headlights are turned on and off by HL switch. The dimmer sw would still work as original.
Relays to control fog lights would be added. Two of the relays would switch the filaments by connecting to the dimmer sw or junction block and feeding their coils with the existing high and low beam outputs from the dimmer switch. The third relay would be operated by the headlight switch position 4.
When the headlight sw was pulled to pos 3, only the headlights would light because the relay in the feed wire is not active yet. The filament control relays would still activate but with no power to the fog lights nothing would happen. When HL switch is pulled to pos 4 the headlights would stay on and the third relay would come in so fog lights will light. Dimmer switch then controls both sets of lights.
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The existing headlights would be fed from position 3 of HL switch by removing the jumper or whatever connection you made between position 3 and 4. All of the remaining headlight wiring would stay as is so headlights are turned on and off by HL switch. The dimmer sw would still work as original.
Relays to control fog lights would be added. Two of the relays would switch the filaments by connecting to the dimmer sw or junction block and feeding their coils with the existing high and low beam outputs from the dimmer switch. The third relay would be operated by the headlight switch position 4.
When the headlight sw was pulled to pos 3, only the headlights would light because the relay in the feed wire is not active yet. The filament control relays would still activate but with no power to the fog lights nothing would happen. When HL switch is pulled to pos 4 the headlights would stay on and the third relay would come in so fog lights will light. Dimmer switch then controls both sets of lights.
Attach file:
(63.40 KB)
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