air intake heater soleniods

[nstag8r1963]

1 have a 1999 2500

I received my ECM back from Auto Computer Specialist. Was told NOT to hook it up until I found the short to ground.

Of the things I checked was the grid heater solenoids. My voltmeter was reading 12v across the big lugs on both of them. Thinking it was bad, I replaced them with OEM type, NO Ford solenoids. I am still reading 12v across the two bug lugs.

TPS is NOT hooked up.

ECM is in but NOT hooked up.

The relay in the PDC is NOT installed.

The two smaller wires on each solenoid ARE hooked up.

I have found and cleaned up 4 grounds in the engine compartment.

i have not had the alternator checked yet.



Any help will be greatly appreciated.

 

[petersonj]

My voltmeter was reading 12v across the big lugs on both of them. Thinking it was bad, I replaced them with OEM type, NO Ford solenoids. I am still reading 12v across the two bug lugs.

With a test lead on each large terminal of one air intake heater relay, it is normal to see 12 volts. One large terminal is hot all the time as it is connected to the battery via a fusible link. The other large terminal is connected to one end of the air intake heater (which has very low electrical resistance) and the other end of the air intake heater is connected to ground.

The part you probably should be concerned about is the control circuit for the air intake heater relay (the small connections) as the voltage for this circuit is supplied by the ECM.

- John

 

[Bob4x4]

If the shop that fixed your controller was right,they should have been able to tell you which driver was damaged.........