HarryD

without the extra relays, all power for the headlights go through the stalk switch for both normal hi-lo and flash-to-pass headlight operation.

The external relays remove the headlight power from the switch.

theiceman

I know Harry .. i started the thread lol .... but there was talk of a 68 or 69 having a factory " relay for high beams". I was curious if that was in the flash to pass .. circuit.

Martin Nedom

Yes, the high beam flash signal does travel through a relay which is located behind the oil pressure gauge. If you are in the luggage compartment, looking at the backside of the dash (looking toward the rear of the car), the relay is located on the left, just aft of the turn signal relay. Having small hands will help you reach that tiny cylinder.

theiceman

great info, this thread continues to be a great resource.

HarryD

68 and 69 Wiring diagrams for reference. They do have some type of hi-beam relay.