Hello there maestros,

I am very familiar with the 240 series headlight system. However my brother

in laws, sisters car is an 87 740T wagon. The headlights don't work on the

beast. I would appreciate some troubleshooting tips. It acts just like

when the headlight switch is bad on a 240. The highbeams come on with the

lever pulled back and you get parking lights but on the headlight position

everything goes out. Do these models use a headlight relay? If so where

is that sucker? Or is this like the 240s with the switches slowly burning

up due to passing all the current. Thank you for all the help.

Dave 82 242ti

There is no headlight relay from about 1984 model year on. The low beams go through the Lamp Failure Relay, the high beams do not. Low beam comes from the headlight switch (terminal 56b) to the Lamp Failure Relay (terminal 56b). At the Lamp Failure Relay the outputs are terminals 56bL and 56bR. High beam out on the headlight switch is 56a. High beam fuses are 17 abd 18, Low beam fuses are 19 and 20. From your description I would suspect the headlight switch since high beams only work momentarily. Remove the Lamp Failure Relay and test for voltage on low beam at the relay socket connection corresponding to Lamp Failure terminal 56b, and so forth.

Thank you for the info John,

Sounds similiar to what I encounter on the older 240 series with the

headlight switch going bad. I'm printing your reply and I'll use it to

troubleshoot. All the best,

Dave 82 242ti