69 273 headlights wont turn on
Did all the lights except for the headlights work BEFORE the headlight switch was changed?
Is it the tail lights or the brake lights that are on all the time?
Door open should not cause any exterior lights to come on.
As for alt not charging at idle... A few things can influence that
- Diameter of the pulley in the alternator, larger caused it to rotate slower.
- Alternator defective
- Resistance in the wiring
- Voltage regulator
- Engine idle RPM
My 67 273 would be in the discharge side of the indicator at a stop light. I replaced the alternator pulley with a smaller diameter one (was ~3" dia, parts book calls for ~2.5" dia) now it is center at idle and slightly to charge when driving.
Measure voltage with car off, doors shut, and any other electrical device off.
Should be around 12.5v ish
Start car keeping all other electrical devices off as before.
Should be above 13v to about under 15v.
There are specs in the Factory Service manual that list amperage capabilities at a given RPM.