MY 1990 NISSAN HEADLAMP ON THE RIGTH SIDE ONLY WORK ON HIGH BEAM AND I CAN'T FIGEROUT WHY I WAS WORKING 2 DAYS AGO I GOT A NEW HEADLAMP FOR IT BUT STILL NO LUCK

High Beam Headlamp Operation
Battery voltage is applied at all times to the coil and switch sides of the HIGH BEAM PCB Relay located in the underhood fuse block. When the headlamp dimmer switch is placed in the high beam position, the headlamp dimmer switch signal circuit to the BCM is pulled low signaling the headlamp high beam request. In response to this signal, the BCM applies ground through the high beam relay control circuit energizing the high beam relay. With the high beam relay energized, battery voltage is applied through the switch side of the relay, the left and right high beam fuses, and the high beam supply voltage circuits illuminating the high beam headlamps. At the same time the BCM sends a GMLAN serial data message to the instrument panel cluster (IPC) requesting the IPC to illuminate the high beam indicator. Ground for the left headlamp is provided at G101 and the right headlamp at G100.

Both your low beam and your high beam is protected by the same fuse, so it makes sense that the fuse is OK if the high beam is working on the passenger side. There are 3 fuses for the headlamps. Fuse #13 in the Battery Junction Box (20 Amp). If this fuse is blown, the headlamp relay will not have any power and neither high nor low beam on either side will work (you will have no headlamps at all) Then there is Fuses #2 and #3 (15 Amp) in the Battery Junction Box. #2 goes to the left low and high beam and #3 goes to the right low and high beam.
The headlamp switch uses a SINGLE CIRCUIT to control BOTH sides at the same time, so if one side works, the switch cannot be the problem. The headlamp relay provides power for fuses #2 and #3 and we already ascertained that these fuses must have power since we have working lights on both sides, so the relay cannot be the problem. A replacement bulb has already been tried, so that pretty much leaves us with a bad lamp socket. (Most likely cause) or a bad connection at splice #S122, which is located in the main wiring harness near the breakout for the left headlamp. (RED/BLACK wire)

Your van has dual diligent headlamp bulbs, that means each headlight has one bulb that serves as high beam and low beam. What has most likely happened is on one side the low beam filament has burnt out, and on the other side the high beam filiment has burnt out. The daytime running lights are just the high beam filament running on reduced power, so if the high beam doesn't work on one side, that same side will have no daytime running light. Replace both headlamp bulbs with matching, good quality bulbs.

Have you replaced the lamps? Most car headlamps have separate elements for low beam and high beam. If both elements are broken, there's your answer. I believe also that the high beams are on a separate fuse to the low beams, so check your fuses to make sure it hasn't blown. Hope this helps!
Cheers, John

could be the headlamp itself, only one filament is working, replace it

well it might be your light bulb socket ud have to look inside there for corrosion and see how the teminals are for where the light bulb plugs in it it looks fine then it also could be the wiring has a short in it

high beam or low beam? or both of them on one side.

• One low beam headlamp is inoperative

• Central junction box (CJB) fuse 23 (10A) (RH headlamp).
• CJB fuse 25 (10A) (LH headlamp).
• Circuitry.
• CJB.

• Go To Pinpoint Test C .

• One high beam headlamp is inoperative

• Circuitry.
• Headlamp assembly.

• Go To Pinpoint Test D .

• The high and low beam headlamp is inoperative on one side

• Circuitry.

• REPAIR ground circuit 57 (BK).

• Headlamp switch
• Multifunction switch
• Vehicle Security Module

• Central junction box (CJB) fuse(s):
  • 17 (15A)
  • 23 (10A)
  • 25 (10A)
  • 35 (20A)
  • 40 (20A)
• Circuitry
• Headlamp bulbs
• Daytime running lamp (DRL) relay

could be the switch. did you do anything to the switch when you changedheadlamps? maybe you put the lamp in incorrectly also did the brights work on the lamp that was "burned out"?

Did you check in the engine compartment.
If you go to autozone or advanced auto parts you can get a book for the car for about 15 bucks

check out
http://www.sferamydlo.com.pl/Zbyszek/Nissan/R20/el.pdf


Bulb Replacement
The headlamp is a semi-sealed beam type which uses a replacable
halogen bulb. The bulb can be replaced from the engine compartment
side without removing the headlamp body.
I Grasp only the plastic base when handling the bulb. Never
touch the glass envelope.
1. Disconnect the battery cable.
2. Disconnect the harness connector from the back side of the
bulb.
3. Pull off the rubber cap.
4. Press end of the retaining pin together to release bulb.
5. Remove the headlamp bulb. Do not shake or rotate the bulb
when removing it.
6. Install the new bulb in reverse order of removal.