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My head lights flickered, then died![700/86] posted by Grant Schildhouse on
Monday, 15 October 2001, at 4:44 p.m.
I have a 1986 740 GLE. I am very new at the Volvo game. It's a great car, but little things have been going wrong with it. Most recently, and a very large problem, my head lights decided to flicker, then die. All the other lights in the car work, and my brights work as well. The brights only work if you hold the lever in position though. Just the tail lights and the head lights are all out. If any one knows why, feel free to e-mail me. I don't check this site often so posting the answer on the site might not help. Thanks for all your help.
Grant
Re: My head lights flickered, then died![700/86] posted by John Sargent on
Monday, 15 October 2001, at 6:11 p.m.
The high beams work because the momentary position of the high beams is supplied with electricity by fuse 2. Relay K is energized by the headlight switch, and supplies electricity to the dimmer switch and fuses 21 and 22. Fuses 21 and 22 supply all lights except the headlights. For a better description of the loads for fuses 21 and 22, see the listing on the back of the fuse cover which is behind the ash tray. Relay K is the second relay from the left in the row of relays nearest the Central Electrical Unit. The CEU is in front of the ash tray. Since all the lights work except the headlights, either the dimmer switch is bad, or one pole of relay K.
To determine if it is relay K, remove it and install a jumper from socket 1 to socket 5 of the relay base. The sockets in the relay base are numbered, but if you can't see the numbers, socket 1 mates with terminal 30 of the relay, and socket 5 mates with terminal 87b of the relay. If you have lights with the jumper in place, the headlight relay is bad. If the headlights still don't work, the dimmer switch is bad.
--John Sargent