Question about 1982 Volvo 240 Series

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No spark 1979 Volvo 245DL Bosch ign

Hi, I have a real challange for y’all
Car won’t start. No spark. Was running fine before I did something (a week or two of messing with this car and I have forgotten what I was working on, but it had nothing to do with the electrics, and certainly not the starting system.
Have run all the basic tests ala official shop manual and Volvo Problem Solver. Nada.
New battery.
No spark from coil
Tried the basic test and hooked a bulb to Terminal 1 of coil and ground and cranked engine - did not light
Swapped in another coil from a running car. Did not work
Hooked up my timing light to the coil (both coils), as well as to plug one, no spark - except after cranking it with no spark, got one flash at the end, I think after I finished cranking. This has happened twice.
Terminal 15 on coil is live
Terminal 1 on coil is about 1.4 volts, right where it should be
The impulse sender resistance is in range
Neither terminal of impulse sender is grounded
Have another control module, swapped it in and no change (both read about the same on the terminals that go to impulse sender - .06 volts and about .5 volts)
Continuity in wire from impulse sender to control terminal
Cleaned contacts and several grounds (engine wall by battery, windshield wiper)
Any suggestions?

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  • bbruneau Sep 19, 2008

    this one is a real problem. can usually fix my own problems but about ready to give up

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  • 360 Answers

There is a relay that controls the spark and fuel. its sometime by the battery or under the dash right of the glove box. two relays in one pack you can replace both with seperate ones good luck i got stumped on one like that

Posted on Sep 19, 2008

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