Crank- No start -Electrical mystery?
Posted: Sat Jul 22, 2017 1:38 pm
This one has got me stumped so I'll try you guys, this looks like the best collection of Astro wisdom on the web.
2004 Cargo,2WD died on the driveway, pulled in one night running fine and no start the next morning. After all the usual diagnosing I'm left with this- No spark, No gas and 1.25 volts between ground and the pink wires for the coil, ICM and pin 19 of the ECM as well as the pink feeding into the fuse box. I've traced the wiring until I've isolated the following-
12v. to the key (Red wire), ability to crank means a strong 12v.
12v. from the key (pink wire) means ignition switch is good
low voltage on the firewall side of the big pink at the connector through the firewall behind the battery
9k ohms resistance between the pink firewall connector and ground (means a short to me)
I can't seem to follow the pink under the dash, I've bought AllData for this van but the wiring diagrams are pretty vague when it comes to the convenience center and such. I'm guessing that it is not a broken wire or stripped insulation since it failed just sitting still, I'm thinking some failure in a relay/component that allows for a short.
Any hints or thoughts before I start stripping all the wiring out from under the dash? That is so my favorite place to work... (I'm 5-11 and 230)
Thanks, Steve
2004 Cargo,2WD died on the driveway, pulled in one night running fine and no start the next morning. After all the usual diagnosing I'm left with this- No spark, No gas and 1.25 volts between ground and the pink wires for the coil, ICM and pin 19 of the ECM as well as the pink feeding into the fuse box. I've traced the wiring until I've isolated the following-
12v. to the key (Red wire), ability to crank means a strong 12v.
12v. from the key (pink wire) means ignition switch is good
low voltage on the firewall side of the big pink at the connector through the firewall behind the battery
9k ohms resistance between the pink firewall connector and ground (means a short to me)
I can't seem to follow the pink under the dash, I've bought AllData for this van but the wiring diagrams are pretty vague when it comes to the convenience center and such. I'm guessing that it is not a broken wire or stripped insulation since it failed just sitting still, I'm thinking some failure in a relay/component that allows for a short.
Any hints or thoughts before I start stripping all the wiring out from under the dash? That is so my favorite place to work... (I'm 5-11 and 230)
Thanks, Steve