• Hi Guest!
    If you appreciate British Car Forum and our 25 years of supporting British car enthusiasts with technical and anicdotal information, collected from our thousands of great members, please support us with a low-cost subscription. You can become a supporting member for less than the dues of most car clubs.

    There are some perks with a member upgrade!
    **Upgrade Now**
    (PS: Subscribers don't see this gawd-aweful banner
Tips
Tips

BN2 headlights

danBN2

Freshman Member
Country flag
Offline
JUST REWIRED my BN2 NEW HARNESS NEW SWITCHES TURNED ON LIGHTS, RUNNING TAIL AND BRAKE LIGHTS,DASH LIGHTS WORK BUT NO HEADLIGHTS OR TURN SIGNALS CHECKED WIRING GROUND,CONNECTERS LOOKS TO BE CORRECT HOW DO I CHECK DIMMER SWITCH?
 
If your TAIL lamps are ON, probably faulty is the connection from the TAIL and the HED lights, at the light switch, control if connections are right and strongly connected.
Sorry haven't the 100/4 Wire diagram I can't offer more aid... so
If with this first control you NOT fix the problem, the better instrument for this investigation is a simple 12 V lamp single filament, with the bulb holder, connect to it TWO long (120 cm) wires, possibly one Red and one Black
(ground depend if your car is POSITIVE or NEGATIVE grounded- normally AH 100 are POSITIVE ground- so RED must be connected to bulb holder ground-
if your car are modified turn to the correct color)
connect the Ground of the lamp to the ground of the car (this contact be fastened and fixed in the engine bay) and connect the battery and the Ignition switch
NOW with the free wire touch the contact beginning from the fuse box contacts-when electricity is present, lamp go ON - and continue the investigation
 
I agree with Andrea, you're going to have to do some voltage checking using either a test lamp, as Andrea suggests, or a volt meter. Check at the light switch itself then at the headlights for 12V. With the headlight switch on push on the dimmer switch and see if you have a blue light on the dash lit. It also could be you don't have the lights grounded properly.

While your checking at the headlights for 12V verify you do indeed have 12V and not 10V or less. If that's the case you might take this opportunity to add relays to the circuits. The switch itself is a huge voltage drain in some cases.
 
Back
Top