My low beams arnt comin on in my 85 delta 88 royale, when I pull the light switch only the high beams come on. Would this be a switch issue or some kinda fuse issue?

 

Could be two bad sealed beams. Use a voltmeter to test for power to the lamp or try a new hopefully good bulb.

Good luck!!!

 

Have you verified the headlamp bulbs are good? They have two elements inside, one for low beams and one for high beams. One possibility is the low beam elements are burned out.

 

Once again, this is why it pays to look at the factory wiring diagram. There are only three wires going to the dimmer switch, one is power in from the headlight switch, one is power out in the low beam position, and one is power out in the high beam position. That one wire feeds the high beam filaments in all four headlight bulbs, so if any ONE headlight is on in the high beam position, the switch is fine. That one wire runs first to the high beam filament in the LH low beam bulb, where two wires are spliced to it, one to the LH high beam bulb and one that runs across the core support to the high beam filament in the RH low beam bulb. That one splits off and runs from the RH low beam bulb to the RH high beam bulb. Since the high beam bulbs work, the problem can't be the splices. Since the low beam filaments work with the dimmer in the low beam position, the problem can't be grounds since the ground wire is common for both filaments in the low beam bulbs. The only possible causes are 1) burned out high beam filaments in both low beam bulbs, or 2) corroded terminals in the connectors on the back of the low beam bulbs. Also, there are no fuses in the headlight circuit. There is a self-resetting circuit breaker built into the headlight switch. If this breaker were open, none of the headlights would work with the dimmer in any position.

 

Here's a dumb question. You HAVE operated the dimmer switch, right? And you can feel the switch click when you pull the multi-function turn signal lever?

If this is a tilt steering column car, I've seen them get out of adjustment and cause problems like this. The switches themselves are a half-assed design anyway, compared to Japanese/European/Ford designs.

*edit* Just looked at your profile and see you're in Canada. Does this car have daytime running lights?

 

Glenn, unless I'm misinterpreting his original post, I think he's saying that in the high beam position, only the two high beam bulbs come on, not the additional two low beam bulbs in high beam mode.

 

I take it to mean that only the high beams are functional in any mode.

 

Maybe. Rather than speculate, perhaps the OP can clarify.

 

Look, to make this easy, this is the headlight circuit. There isn't much to it. What is working and what is not?

 

no matter what position the switch is in the two inner set of headlights won’t come on. So it’s the dimmer switch that needs replacing?

 

No, at least not yet. Again, if ANY of the lights come on in the high beam position, then you have power on ALL the green wires. Since your high beam bulbs are working, check to see if you have power on the green wires at the low beam bulbs. If you do, check the ground wires from those bulbs. If both are good, see if the bulbs are burned out.

 

On the car: the two OUTER headlights (nearest the fenders) are combination or low beam lamps. There are TWO filaments in these- one for low beams, and one that switches on when dimmer switch is set to high-beam position. The low-beam filament goes out when dimmer activates high beams.

The two INNER headlamps (nearest the grille) have only ONE filament and light only when high beams are activated.

Which set of lamps on your car is not lighting? And what do the lamps do when operating the dimmer switch lever?

 

DOH! I misread the OP's last post. Here's a better question for the OP: Please post a photo of which lights are illuminated.

 

the lights that are illuminated are the amber and headlights closest to the tire on each side.

 

So the OUTBOARD, low beam lights are on with the switch in both high and low beam positions?

 

yes, those are the only ones coming on no matter what position the switch is.

 

Before buying any parts, check for voltage at the green wire in each of the headlight sockets with the dimmer switch in both positions. If you get voltage on any one of them, the dimmer switch is good. If not, replace the dimmer switch.
If you DO get voltage, is it on some or all of the sockets? If all, then the bulbs are burned out. If some, find the loose or corroded crimp that is causing the open circuit.