We had a couple of Volvo cars in the late 80s when our kids were being born. Always liked their performance, braking, acceleration (even with a turbocharged four-banger). The station wagon developed an annoying habit of randomly activating the ABS when slowing below 15 mph. I kept taking it to the dealer and they could find nothing. They kept it for longer and longer periods to experience it. After 26 (yes, really, TWENTY SIX) visits to the shop, they finally called in an engineer from Sweden to diagnose it. He quickly found that the wiring harness was faulty. To Volvo’s credit, they kept extending the warranty for me and I didn’t have to pay a dime for all the diagnostic and repair work. They ended up changing out the entire wiring harness and the problem stopped.
I wonder if the wiring harness had been eaten by critters? I always figured it was poor weatherization that caused connectors to corrode, but maybe it was rodents.
I would not be surprised if it was rats, mice or squirrels.................