ECM Solenoid Fuse

[funky rooster]

Hey Guys
I have a 87 Buick Regal T-Type.
I am currently having a Service Engine Code 31, I have changed my waste gate solenoid, my vacumm lines and I have followed the wires to the ECM and non are grounding out anywhere. That led to believe the ECM Solenoid fuse is blown, but after replacing it, it keeps on blowing as soon as I turn on the egnition.

LOOKING FOR SOME DIRECTION TO TRY AND SOLVE THIS PROBLEM......PLEASE HELP

 

[salvageV6]

Unplug the connector going into the transmission, then try a new fuse. Key on test if they are blowing that way no need to run the car.


If it pops again it's the transmission TCC solenoid or wiring shorting out inside the tranny.

Other circuits on that fuse are the EGR solenoid, cannister purge solenoid, and A/C cutout relay, cannister purge solenoid, and the coolant fan delay relay power.

 

[turbofish38]

Check your wastegate solenoid. If the fuse pops when you get into the boost than that is usually the cause.

 

[funky rooster]

To SalvageV6 & Turbofish38

Thanks for your replies guys.

Turbofish38 my fuse blows as soon as I turn on the egnition but the service engine light doesn't turn on until I actually accelerate to use the turbo.
SalvageV6 I will be trying out your solution hopefully this weekend since I am extremely busy with work.

I will let you know how things work out as soon as I do the work.

Thanks alot
Funky Rooster

 

[VadersV6]

You have to find what is drawing that much current. Check all grounds. A loose or corroded/ oxidized connection (where a ground mates to a ground source) can draw alot of current. Look at the schematic if you can find it, and look for the ground sources for the ECM Sol circuit. Sounds like the circuit is grounding to the wrong source from the proper source not doing the job. Like, a high current power source is being misdirected and ending up at the ECM/SOL fuse that cant handle the current. Make sure your starter solenoid is ok and make sure all the wires going to and away from it are all connected properly.
I tried reading the schematic from gnttype, but the quality of the pic is too bad to read.

 

[GNVenom]

Unplug the cannister purge solenoid and the EGR solenoid. Then do the fuse trick. These two solenoids, plus the wastegate solenoid, are fed from the fuse. If any one of these are shorted, it'll blow the fuse.

-John Spina
www.casperselectronics.com

 

[funky rooster]

Thanks for your ADVICE guys

I unpluged my wiring harness to the transmision and took the car for a spin. The ECM fuse did not blow.
What a relief this problem has been bothering me for a long time.

Once again THANKS FOR THE ADVICE GUYS

 

[Quick6'n'-K.C.]

I unpluged my wiring harness to the transmision and took the car for a spin. The ECM fuse did not blow.
What a relief this problem has been bothering me for a long time.

Once again THANKS FOR THE ADVICE GUYS

I have seen the wires get pinched when someone did a bad transmission filter change before i purchased my first car and it did this same thing-

Drop the tranny pan and see if you see a wire hanging off your 3rd or 4th gear pressure switches... Might as well replace the filter and put in a new TCC solenoid and install a drain plug in the transmission pan.

Oh, by the way, with that ecm solenoid fuse blown, your car will not lock the convertor on the highway and you will get worse gas mileage.

If you sort out the wiring issue in the tranny then plug that connector back in and now your convertor will lock on the highway.

HTH
BW