Hello Forum Members,
I am in need of serious help. Our 05 Crossfire is currently DOA/completely flat lined! It is an electrical issue. The 50 amp fuse HYDROLIC UNIT TRACTION in the fuse box under the hood next to the battery (passenger side of car) keeps blowing. The trouble is in trying to trace this wire in the field of wires to figure out where the GROUNDING is occurring.


Per diagnosis, I know that it keeps blowing because there is a ground wire somewhere, we are just not sure where.


IMPORTANT NOTE: The ground fault in this 50 amp fuse issue is causing absolutely NO POWER to ANY part of the vehicle. It is completely DOA…no sign of life! No power electrically nor mechanically…none…zero…zilch!


I know that it is not a crank position sensor (cps) because symptoms of a bad cps would make the car stall out not completely die.


I know that it is not the RCM relay control module because symptoms of a bad rcm would lead the car to have electric power but not crank/start.


Any help is greatly appreciated. If this post is not clear. Please let me know. In summary the 50 amp fuse labeled Hydraulic Unit traction keeps blowing and when it blows the car is a brick with no sign of life. We need to figure out what keeps blowing that fuse.


Thank you kindly in advance,
Flatline

 

Replace the fuse with a large 12 volt lamp so that you can get a visual indication of the short and if it changes or go away with jiggling. This will energize the shorted conductor so you can probe the wiring - looking for the current path.

I have dc clamp on ampmeters but if the lamp is big enough you could use a small compass to see the current in the wire.

Woody

 

Absolutely genius, Woody !!
Why didn't I think of that !!!
What I did think of was that any wire that is blowing a 50 amp fuse should have some signs of the insulation melting .....

14v X 50 amps = 700 watts, that's gotta heat up something, unless it's like an 6 or 8 gauge wire.

 

Do you have an ohm meter?

Find the service manual link and download it. You will need to know all components that are fed through the 50A fuse and disconnect them all. Then one by one test them with the ohm meter for a short.

 

Yes we have an ohm meter. He said that's a great idea. We'll give it a try and post back. Thank you all very much!