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I have an automatic 1992 Volvo 240 with the 2.4 system that will only start with the key sometimes. the problem began with the starter not turning off when in the run position. To solve this I put a button between the push-on connection and the starter. the issue then grew into the starter only being activated sometimes by the key. For now, I've been starting it by touching the starter and the big wire together with a screwdriver (or using the button if it decides to work). I tried wiggling the shifter to see if it was the neutral safety switch and nothing happened. could it have something to do with the steering column or ignition coil? maybe the contacts in the lock? any info helps
Obviously 12v is not getting to the starter wire. Unfortunately the only sure way is to trace the starter wire from the starter and look for wire damage or bad connection.
Examine your wiring harness as shown in the upper picture. Those 4 wires go to the starter, oil warning sender, alternator, and temp sensor. If other wires touch the starter wire the starter might not stop running.
If the starter won't turn off - reach down and unplug the small wire on the solenoid. Did it stop? If so that wire is shorted to another probably in the harness or at the firewall connector that has power.
If the starter does not work at all - use your remote starter switch and try manually to test the starter. If the starter has stuck on in the past it could be fried. If it still does not work, take it off and bench test it with jumper cables and your remote starter switch.
Check your NSS to make sure it's aligned (don't just wiggle), Loosen the shift indicator cover and verify the white pointer is aligned in the park and neutral position. If so verify with your $5 test light or voltmeter that there is voltage going through the switch when key is turned to start position. Either touch the electrical connections on the side of the switch or the wiring harness is extended to a connector on the left side of the transmission tunnel under the carpet - check for power there.
Most likely the problem is in the wiring and ignition coils. I had a battery too quickly on my old car. I had to think about buying an alternator, this is a good upgrade these days, this device helps to cope with the loads that go to the old wiring of our cars. Here https://nashvilleperformance.com/105...or-vs-130-amp/ and comparison 105 amp alternator vs 130 amp also detailed information on how an alternator works and all its benefits.
Last edited by Bob_Fins; Jan 10, 2022 at 04:29 PM.
Weird starting issues
