After goings over a bump, why did headlights, tail lights and some dash lights go off and alternator light came on?

All of the marker and tail lights are powered from a 15amp fuse going thru the headlight switch on a brown wire. Do you have power from that circuit coming out of the headlight switch ?

These are all different circuits. The brake lights are on a 10amp fuse - the headlights are on a 50amp fuse - and the parking and dash lights are on a 20amp fuse.
Do you have power going into the headlight switch and the brake light switch ?

Turn the light switch on and check your tail lights. Back then the tail and dash lights work on the same circuit inside the headlight switch so if one was out so was the other. If this is the case you need a new headlight switch. If not, there should be a fuse in your panel marked "instr". that's for the dash lights. Hope this helps.

Tail lights, parking lights and dash lights are all on the same circuit...I'd go to the fuse panel under the dash and check the fuse for those lights....usually referred to as accessory lighting in the owners manual and is usually a 10A fuse.

Hope this helps...

I'm having the same problem on my 1995 Honda Accord.  I hit a bump hard last night, and my dash lights, tail-lights, license-plate lights, and the bell which 'bing's when the door is open and the headlights are on all stopped working.  The fuse for "Small lights" under the hood was blown.  Replaced it, turned on headlights, and it blew again instantly.
I'm guessing that I have a wire crossed (possibly inside the bulb itself) in the dash somewhere;  I checked the taillights and license-plate liights already.

Good luck!  I'll let you know how my fix goes.

If the tail lights and the dash lights stopped working and the tail light and the panel lighting fuses are both o.k. and you can find no other blown fuses then the problem is most likely the headlight switch.

it could problem with main connector of headlight or combi switch, pls clean it and re fix it.

The relay has nothing to do with the tail lights, but replacing the switch sounds like a good idea. There's a nut holding it in place, see http://www.skandix.de/en/spare-parts/electrics/switches/switch-headlight/1027524/ to get an idea of the construction. And the price. This is not worth fiddling about unreliable workarounds...
In addition, if fuses 15 and/or 16 burn frequently there might be a problem with the tail light cabling.

Good luck
Ingo

dash and tail sre tied together, so chk tail light fuse.

This is a problewm I have been researching. On the 91 Loyale there are two headlight relays. The relay for the left headlight also controls the instrument lights and the running lights. If the right relay is working and the left is not, the left headlight will be dim because of a back electrical path through the high beam indicator light on the dash, but the instrument and running lights will be out. I have been trying to find out where Subaru put these relays, but three Subaru service departments have been no help. One dealer's service department told me to remove the large bezel around the instrument panel. I did and the relays weren't there. Lots of luck.
John