Blown ign ecm fuse - 1994 GMC Yukon

FORGOT TO SAY FUSE IGN BLOWS?
NO FUSE NUMBER TOLD FAILING. IF IS.
BLOWN FUSE, BE REAL CLEAR WHICH ONE BLEW.

22RE ENGINE,. LEARN WHAT IS THERE FIRST. REAL NAMES GET REAL ANSWERS .
22RE
ING FUSE AND EFI FUSE.
OR ENGINE FUSE. REAL NAMES SEEN USA SPEC CAR PU.
FED OR CALIF. CAR?

IGN FUSE , RUNS THESE THINGS, THAT CAN SHORT.
ALL ARE BLACK/YELLOW WIRES
FED CAR.
ECM PIN 3.
AIR INJECTOR VALVE.
EVAP VALVE
FUEL CUT SOLENOID AT CARB IN FACT 2 OF THEM.
OOPS CALIFORNIA CAR LOTS MORE;.
TOP CAUSE IS BAR NONE


TOP CAUSE SEE ?
IS SHORTED OUT O2 SENSOR, OR WIRES TO IT MELTED TO 2000 F DEGREE EXHAUST MANIFOLD. SMOKEN OUT BURNED.
OR THE 02 SENSOR IS SHORTED, AS THEY LOVE TO DO;.
JUST UNPLUG 02 SEE IF FUSE IGN HOLDS, KEEP WIRES SAFE.
NOT DANGLING.

CALIF HORROR.

a short in the ign system or ecm will need a meter to test both systems

The other modules on the vehicle have nothing to do with the PCM / ECM fuse blowing . Looking at a electrical distribution diagram to see what all the PCM/ECM fuse power's up an issolate all the thing's one at a time till the fuse doesn't blow any more . Suggest you check out a few video's on youtube on how to find a electrical short . Your best bet mite be to take it to a qualified repair shop that has the knowledge an testing equipment to diagnose this problem . Because it doesn't sound like you know much about it . All the other modules on the vehicle have their own fuse . Something the PCM/ECM power's is causing the fuse to blow . What fuse is blowing ? You don't say ? What code's did you pull an what kind of code reader did you use .
Finding active short
Electric Testing Techniques You Need to Know
ECM Inputs and Outputs Diagnosis

Usually cigarette lighter fuse

There really is no " ignition sensor fuse" below is a diagram of the under hood fuse box. Circled is the Ign/crank relay and ECM ign fuse.

Check all your fuses, under the hood and at the fuse panel for ign fuse or ecm fuse and make sure they are'nt blown, then check for power to ign module which is under the coil paks, should be pink wire. good luck...sounds like maybe your ign module or crank sensor may have gone bad.

90 Safari van 4.3 engine EMC fuse keeps blowing, found white wire
going to the injector grounded out, solved my problem.
hope this helps from bustedknuckles.........

Fuse # 10 should be red, a 10 Amp fuse for the Engine controls, gas version. Also check and make sure # 29, also a blue 15 Amp fuse is ok. I believe this circuit serves the ECM power for the ign coils

1996 GMC 1500 Pickup.
Replaced Coil, Dist cap/Rotor, Ign Mod & pick-up.
All showed to be bad with OHM meter.

20A ECM-B fuse keeps blowing out and I'm afraid to burn these new parts up....

ANY IDEAS OUT THERE???