Hello!

Where on the engine harness is the ignition coil relay located in a Volvo 960 3.0 91-93 with a B6304F and Motronic 1.8? On this harness it should be located besides the injector relay conector soon after the connector on the engine harness which connects to the chassi harness:




But on my engine harness there is only a connector for the injector relay, no connector for the ignition coil relay:



There's also this blue two pole connector which is supposed to go to both the injector- and ignition coil relay based on the pins it goes to in the connector between the engine harness and chassi harness:


The problem is that I've never seen this blue connector in the wiring diagrams, and I cannot figure out where the ignition coil relay is supposed to be. So I'm really in need of some advice here. Or could it be because this engine is from Volvos engine lab here in Sweden and they've modified the engine harness, and I therfore need to buy an unmodified one?

// Hugo

 

You might find what you are looking for on this guys page. that plug you are holding goes to the black rectangular bosch relay with the round connectors. It is used many places on volvos. (240 fan, 960 injectors, 940, 740, etc)

https://www.prancingmoose.com/volvorelays.html

 

The Volvo 960s use a pair of "ignition modules" that a mounted on each side of the intake chamber. See FCP as a source, there are several mfg's listed at various price points, but make sure they are mounted with thermal connection. Each module operates 3 of the spark plugs. I note that these modules provide the same function as an old points / distributor ignition system, simply switching 12V to the individual spark plug coils. Do not use any of the advertised surface gap spark plugs, because the spark plug gap must be between 0.024" and 0.028" for proper operation.