Yeah throw a relay in. Chances are it's like all the other relays regular old potter brumfield . But I'm betting on the ecu personally. The cheapest way is to buy the blankety blank electronics manual as I did it's seperate from the workshop manual but is very complete and kept me from throwing money at my vehicle. I'm surprised yours isn't in this site as mine is that's to say someone had a troubleshooting diagnostic that followed just like my manual states.