Quote:
Instead of disconnecting circuits, just pull the inline fuses one by one until it stops. There's not that many, see wire diagram. The wiring diagram is on here, if you need it.
You definitely need to narrow down what the noise is. The breakers when cycling makes a rhythmic metallic ticking sound every 1-2 seconds or so. The lights would cycle on and off in time with the ticks. The turnsignal flasher is similar in sound but is a little faster in cycle time. If wired correctly, the turn signal will not be powered when the key is off.
I believe there will only be four inline fuses you can disconnect under the dash -- unless there are some added accessories. Clock, heater, turn signal and radio. Of the four, if the car is wired per factory instructions only the clock fuse will have power when the ign key is off. It is conceivable the clock could be unable to wind properly and the winding mechanism is making a noise every few seconds instead of the normal every 30-60 seconds . It makes a heavier sounding click which you may be able to feel by putting your fingers on the clock.
The accessory circuit breaker where I suggested removing the wires from one side will protect the courtesy, brake and glove box lights and possibly an added accessory. That breaker is powered all the time and is the only place to remove power from the interior light portion of the wiring likely to be causing an issue.
The breaker on the headlight switch also is powered all the time but if the switch is off, if wired per factory that breaker should not be able to power anything past the switch. When the headlight switch is in any position other than off the breaker will protect dash, tail, parking and headlights. If the switch did happen to be left in the park or headlight position then that opens up a whole bunch of places where there could be problems.
The headlight switch breaker is not that easy to reach while it is in position and you do need to be careful not to break the phenolic board the breaker mounts to when working around it. If removing wires from the accessory breaker did not narrow things down then that would be the next likely suspect. Dash lights can be eliminated by turning them off with the instrument switch. Unless you see an obvious bad spot, If the breaker proves to be the culprit finding a problem other than dash lights would need to have the switch panel removed and wires disconnected from the switch to narrow down the problem area.
This Post was from: https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?post_id=185207