Hello,

Both headlights of my 87 244 stopped working at the same time. Is this a fuse or a ground problem? I tried to find which fuse it might be in my Bentley's manual, but couldn't find the listing.

Help!!!

In addition to Bob C's summary, if just the Low beams are out, the Bulb Failure Sensor could be at fault. Low beam voltage comes in on a single wire, then splits to feed each lamp, as it's tested for equal current in each leg.

You'd need to trace the voltage with a meter or test light at the sensor, or replace it with one that is known to be OK. It's a red cylinder, clipped to the lower edge of the dash on the driver's side.

We can help with wire colors, terminal numbers, etc. if you want to test anything like that.
--
Bruce Young
'93 940-NA (current) — 240s (one V8) — 140s — 122s — since '63.

A little more info, please.

Both sides out? OK. How about high beam and low beam? How about the flasher/passing signal operation? How about the front corner lights?


That car has two relays in the headlight system. Like the earlier 240s, it has the stepping relay. Mounted on the left side inner front fender, it switches power from high beam to low and also operates with the passing signal. when it steps it makes a "clink" sound.

It also has a lockout relay, a change beginning in the 1986 models. It is mounted above the driver's right toe. It engages when the key is in Position II, thus making it impossible to remove the key and leave on the headlights.

Note that it offers no such protection if the headlight switch is in parking light position.

Either of the two relays could fail and give you the no lights situation.

A little more info will help determine which, or whether a relay is at fault.

There is no fuse in the headlight circuit.

Good Luck,

Bob

:>)