Focus hard on the wires from the double up to bulb socket. Diagram shows DBL wire from firewall connetor to one half of instrument cluster connector... thru cluster connector contacts and out to another DBL wire to the bulb socket. We know the flash signal from turn signal switch (DBL wire) is getting to that two DBL wire double up on the firewall connector, because the front right light flashes.
You can unplug the instrument cluster connector and see if the flash is reaching the DBL pin of the cluster connector half that is wired to the firewall connector. IF so, check continuity from other half DBL pin to bulb socket contact.
OR....
Cut to the chase and run a direct test wire from double up DBL to the hanging bulb socket. Make sure, as I said, that socket housing is well grounded while hanging. Key on, lever at right turn. You will be bypassing all existing wires and connectors. If it blinks then, incorporate that wire into the under dash harness. Don't bother finding and fixing whatever is wrong.
Regardless, Shine up the bulb brass case, the inside and outside of socket and where socket touches dash. Shine up the mating dash surface. Even though we see that ground is working for the left turn. Just a thorough thing to do.
Make sure all solder connections are good.
Next week.
Last edited by bartamos; 07/15/2025 6:08 PM. Reason: clarification
