Hi,
Does anyone know if the headlight relay from a 140 (1974) is interchangeable with one from a 240? I had a look in my parts 240 (1981) and found 2 relays with 6 pins (like the 140 headlight relay) under the dash. However the numbers on the pins are different to the 140 relay, so I don't know if either would work.
Any ideas out there?
Regards
JohnH
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JohnH, Sydney, Australia

Hello,

Can you supply pictures of the relays in question?

FYI, all 140/160 and 1800e/es headlight relays are functionally the same as all of the 240/260 headlight relays and they also should look very similar.

IIRC, you might have to remove the wires from the plastic insulator plugs to make a newer style headlight relay work as the contacts on the newer relays were rearranged.

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Eric
Hi Performance Automotive Service (formerly OVO or Old Volvos Only)
Torrance, CA 90502

Hi Eric,

I don't think there is any point sending you pictures. The couple of relays I found were inside the car against the left side firewall. I'd heard that some 240s had the headlight relays inside and just assumed these were they. I now think they must be for something else because I found old wiring and connectors (but no relay) on the inside left guard where the relay is located on the 140.

It was a parts car and cost me nothing, so I can't complain if it's missing a relay.

By the way, all my suspension bushes etc arrived. Many thanks!

JohnH
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JohnH, Sydney, Australia

You might get some help here.

http://www.davebarton.com/volvorelays.html#headlightrelay

The pin numbers on relays do have meanings. Here's a chart explaining what they mean:
http://www.vintagebus.com/wiring/defs.html

I haven't tried the interchange and I can't say with any certainty that it can't be done (heck, nearly anything can be done if you've got enough will) but I can say that if the pin numbers are not the same then you'll have to do some thinking to adapt the one to the other.

Reminder: brand-new 140 headlight relays are now readily available and not particularly expensive.