Hello everyone,

1988 Volvo 740

Bosch made in Spain relay 0332015006

So this is what I have done so far.

I disconnected the neg. cable from battery and hooked up two wires with alligator clips to the headlight relay . It closed and I could hear it close. But while the alligator clips still connected, I touched the other prongs with my multi meter and didn't get a reading at all. I read that a reading of one and the sound of the closed circuit would equal a good relay. I got the sound but no reading at all on the meter.

Also, I checked all fuses and then disconnected neg cable and checked the continuity of the head lamps. I got a buzz sound with both sides.

So My verdict is a bad relay because I got a zero reading.

Would that be correct.

Thanks for any advice.
I LOVE my Volvo...

 

if you disconnect the battery ground terminal, how are you measuring voltages?

you hooked up these alligator clips to which relay terminals?

I only have the wiring diagram for 91+ but the headlights shouldn't be that different.

the battery positive terminal should be connected to pin 1(30) of the high beam step relay.

 

oh, and you never described your symptoms. no headlights at all? no high beams? or what?

 

Hello Pierce.

Yes In my original post I wrote that I have only one head light and used to get both when high beams where on . Now in addition to the high beams being on I have to hold the lever in to get both lights on.


As far as checking my relays I disconnect the bat and hook up alligator clips to the battery and check the relays that register a .3 with my meter and the clips connected. '

I wrote all of this...

I dont have a short because my car starts right up.

So I am not messing with the wires. I have decided to hunt for a light switch and swap it out.

Would you know what Volvo's and year that would have the same switch as my 88 Volvo 740 .

Thanks.

 

if the headlight switch was bad, you would have no headlights, highbeam OR lowbeam as there's only one contact for all of them. that goes to the high/low relay, which is controlled by the dimmer stalk on the steering column, and from the relay it goes to the bulb-out detector, where left and right side split off.

you need a wiring diagram of this specific for your year/model car, then you need to trace the voltages around to see whats going on, I think I said this several posts ago.

the headlight switch for you car is Volvo PN 1362699, NLA (no longer available), and according to volvopartswebstore.com (a dealer's parts website), it fits...


Volvo 740 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992
Volvo 760 1985, 1986, 1987
Volvo 780 1987, 1988, 1989, 1990, 1991
Volvo 940 1991, 1992, 1993, 1994, 1995
Volvo 940 4DRS S.R 1991, 1992, 1993
Volvo 940 4DRS W/O S.R 1991, 1992, 1993
Volvo 940 5DRS S.R 1991, 1992, 1993
Volvo 940 5DRS W/O S.R 1991, 1992, 1993
Volvo 940 SE 4DRS S.R 1991, 1992
Volvo 940 SE 5DRS S.R 1991, 1992
Volvo 960 4DRS S.R 1992, 1993
Volvo 960 5DRS S.R 1992, 1993

so pretty much all 740, 760, 940, and pre-facelift 960's.