I have been fixing my grandfather's volvo he bought in 1976, so my daughter can drive it to high school.
Her sister drove it to high school and it is still a great car with a little over 100K on it.

My fuel pump is intermittent, and I'm currently having to use a jumper from the battery to the fuel pump to get it to work.

I currently have a friend looking at it who knows cars, Volvo's and wiring.
He thinks the ground to the ignition might be bad, but can't locate any schematics.

Any ideas/suggestions?

Thanks.
-Chris

'76 Volvo 240DL trying to locate wiring schematics.

 

There is a fuel pump relay, located under the dash on the drivers side (on the earlier 240's, it was moved to the right side in later cars) that commonly get cracked solder connections and fail to send power to the pumps. The fuel pump relay does rely on a signal from the ignition system, indicating there is a spark, (perhaps a white/red stripe wire at the relay) to keep the fuel pumps running - no spark = fuel pumps shut down. Early relays had silver metal cans, then switched to a green relay if my memory is correct. Simple thing - make sure there's good connections at the fuel pump fuse - (and the rest of them while you are there)

The green one looks like this

https://www.volvopartswebstore.com/p...4/3523639.html

 

Yep. I replaced both relays for the fuel pump 5 years ago. I thought that could be an issue again, so ordered two new ones from my volvo dealer (took 3 weeks to get one of them, since it was coming from Sweden). Put them in and... nothing.
It's becoming frustrating .

Thanks for replying to my post. I really appreciate it.
-Chris

 

https://volvoforums.com/forum/attach...-relay-001.jpg

 

John,
thanks for the schematic. I saved it to my files.
I tracked it to a faulty ground in the ignition switch.
replaced it and it now starts.
on to the next issue. :-)