Headlight relay my headlight , and interior lights will not come on , i have checked and replaces fuses , replaced headlight switch , and dimmer switch . iv checked the wires and they look good . please help

Check the dimmer switch! Head lights should still work if dimmer! But no interior dash lights! Fuse for lights is under hood in fuse center! If it is the headlights I would check the switch and if applicable the relay! I assume you have checked for ground at the light and power at the headlight fuses!! Good luck

as you checked already fuses, relays and bulbs there must be something wrong with the light switch in the dashboard.
- either a loose connector or worn out contacts. first remove the switch and spray some WD-40 or similar contact spray into the connector from behind - if that does not help you have to replace the light switch with a new one...

Before you replace the #46 HDM relay (in the fuse block under the hood) try exchanging it with the #45 cooling fan relay and see if your low beam lights work. If they do, the HDM relay (actually solid state module, not a relay) is bad.

I guess you could say there is no fuse for the dash lights.
The dimmer control on the headlight switch actually goes thru the body computer and the dash lights get their power from there. The body computer has several fuses involved. The other interior lights not controlled by the dimmer get power from the park lamp relay.

Pull this circuit breaker till you can find the problem. Check for applicable trouble codes. You have a lighting control module, I can't troubleshoot that component from here.

I love gremlins. ok first thing first. the headlights, you will see a fuse box in the engine compartment near the battery. remove the cover and you will find fuses and relays. if there is no label showing you which is which (look under the lid you just took off), feel them. the one very very hot is the one that controls the headlights (if they are stuck on a the time you do that.) replace that. it should sort out your headlight issue and possibly the interior lights.
now on to the interior lights. you haven't mentioned a blown fuse, i presume you did check them. same thing. check all the relays for one that is very hot, your door would be open anyways so the interior lights will be on at the time. replace that relay.
as a side note the headlight issue could be caused by the daytime running light module often bolted right to the firewall.
Those would be a good start and hopefully slay the gremlins

The dimmer switch on the stalk usually operates a relay in the fuse box.
It could be the dimmer switch, relay, lowbeam fuse, or odd coincidence both lowbeam filaments went out.
Use a test light and work backwards.

it sounds as though there is a loose connection on the passenger side. Check socket and switch bulbs from driver and passenger side. hope this helps tim

Your ranger'nt have a relay,you need to check the grounds to each light or you simply need two lights,or a dimmer switch.Check for power with a test light and if you hahe power replace the light,if you don't replace the dimmer switch.

check dash light dimmer switch for power,if no power replace the headlight switch.if you have power at dimmer see if you have it coming out of the dimmer switch,if no power replace dimmer