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i was messing around with my 88 dl wagon today and got everything to light up. it sputtered and almost started i even got the little light on the ecm to work. then i went and bolted the two relays back up above the ecm and now the ign doesn't work  so i am thinking the square relay is the ign relay and the round one is the fuel pump relay and i think the ign relay is bad. how do i test it or bypass it temperarily? chiltons and haynes are not helping any.

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hmmm my 85 MY mpfi turbo had two round 22A relays as found all over our years of subes and Mitsubishis too!

 

how many pins on relay of concern ? 4 ?

 

surely one has to be an earth for the coil of the relay.

 

Hook up a test light to power and touch each wire to that relay to see if just one earths out - treat it as #85 on an ordinary horn relay.

 

swap test light clip to a known earth such as the key in ignition switch, and probe with ignition on for a wire only to operate with IGN on - this should be the lightest of two with power on with IGN - likely your #86 contact. See if you can make these two wires click a good relay without any other wires added to relay. The fatter IGN power wire would then go to #30 and #87 could go out to power up say the coil ? another reasonable test point

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the square one is definatly the ign one the round is the fuel pump relay. the square one has 6 terminals four for the output and two for the input,wheras the round one has  just four terminals. i have va spare ign relay from the wrecking yard and i got some life out of the ecm and heard the fuel pump kick in but smelled gas so i looked underneith  and gas was pouring out of the fuel pump and it wasn't the lines, can i buy a new one  like the original or do i have to go aftermarket?

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  • 2 years later...

the 6 pins make kinduv a "U" pattern

 

the 2 pins at the ends of the "U" are the coil for the relay control.

 

the other 4 pins, 2 on one side are the 12v coming from fusible link box, and the other 2 are the out to ECU and engine.  so if you jumper across the 2 sides of the "U" you can bypass the relay.

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  • 1 year later...

it is a bad ground wire up under the dash. i found out from the lady i bought it from her 14 yr old son got mad when mom sold the car and grabbed the wires under the dash. then threw paint on the car. if i had tried that when i was a kid i wouldn't be sitting down yet. all she did was give him a time out and sent him to his room.

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