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4 relays have intermittent problems... AC, Fuel pump, cooling fans, pcm

Posted: Sat Sep 07, 2019 2:55 pm
by Dannybones
2001 Taurus DOHC. Drove it home without any problem 20 miles after mechanic replaced fuel pump. Then I stopped for gas, and it wouldn't stay started, or started but wouldn't get fuel.. Sometimes it starts and runs fine, sometimes all four relays stop functioning. Has anyone ever experienced something like this? Do I need to just replace those four relays, or could there be a common problem with the relay box or something?
Thank you so much!!!

Re: 4 relays have intermittent problems... AC, Fuel pump, cooling fans, pcm

Posted: Sun Sep 22, 2019 9:56 am
by Magus732
The immediate suspect would be loose wiring harnesses for all four relays; if the underhood fuse box had issues, it's likely that more than just these four systems would be affected. Have your mechanic double check the relay connections; they're probably loose enough that a jolt breaks contact.

Re: 4 relays have intermittent problems... AC, Fuel pump, cooling fans, pcm

Posted: Sun Sep 22, 2019 12:45 pm
by Dannybones
Thank you, I do appreciate it! It may turn out to be something else, something to do with the ignition or computer I think. Who knows, maybe we'll never figure it out.