Afternoon all,
I have a 90 YJ 4.2 with the 2150 Carb that has been Nuttered and nearly everything ripped out of the engine bay. I started out last week to replace the ICM due to a suddenly developed (this year) sporadic engine shut off, as well as to remove the remaining old electrical harness along the firewall and have only the actively used wires. Problem is I cut a few extra wires going a little too quickly and now I have a no start. The starter will engage but I verified I am getting no spark. I attached a picture showing how I have everything wired up, I am looking for some help to find what I have wrong. Also the coil is new, and I am now currently hooked up to the new ICM. I verified I was getting power to the coil (+) terminal during engine start.
I hope my drawing is understandable, but I will give a brief description to aid it. The letters above the ICM are the colours of the wires, the letters for 4 of them are the colours of the wire after the connectors which i kept, so Black, Green with White stripe, Yellow, and Green, with the remaining two wires without a connector going directly to the distributor being the Orange and Violet wire. While the letters underneath (B, G/W, Y, G) are the colours of the wires when they come out of the ICM before the connector so, Black with Green stripe, Green, Red, and White.
I drew the starter relay how it appears when viewing straight on. The 'hub' is the positive post feeding the rest of the jeep and is connected to the two red wires coming out of the factory style alternator as well as the battery. I have maintained all of the fusible links at this post. Relay connection 1 goes to the + side of the coil when the key is in the start position, connection 2 is connected to the starter solenoid, and connection 3 is connection to the ICM along with the ignition wire that has 12v in the start only position.
The ignition wire with 12v in the ON and Start position is connected to the Yellow or Red wire at the ICM along with the alternator resistance wire.
The (-) Side of the coil is connected to the Green with White stripe or Green wire at the ICM along with the wire that runs to the tachometer.
I was using the original ICM to test everything but fearing I totally fried it I switched to the new one and tried the current wiring setup without it being able to start.
I also tried reversing the coil connections but that did nothing.
I ensured the starter relay was grounded properly which it is since the starter will activate when attempting to start.
I verified I have 12v in the ignition ON/START wire, as well as 12v in the START ONLY wire when the key is in the start position
I used an inline spark tester to confirm I am not getting any spark at the plug
The ignition coil is new last year and since it still started before I ripped the wires out I have no reason to believe it is the problem
To simply further, the colours coming out of the new ICM are Black, White, Orange, Violet, Red, Green.
Any help figuring this out would be greatly appreciated!
Brent
I have a 90 YJ 4.2 with the 2150 Carb that has been Nuttered and nearly everything ripped out of the engine bay. I started out last week to replace the ICM due to a suddenly developed (this year) sporadic engine shut off, as well as to remove the remaining old electrical harness along the firewall and have only the actively used wires. Problem is I cut a few extra wires going a little too quickly and now I have a no start. The starter will engage but I verified I am getting no spark. I attached a picture showing how I have everything wired up, I am looking for some help to find what I have wrong. Also the coil is new, and I am now currently hooked up to the new ICM. I verified I was getting power to the coil (+) terminal during engine start.
I hope my drawing is understandable, but I will give a brief description to aid it. The letters above the ICM are the colours of the wires, the letters for 4 of them are the colours of the wire after the connectors which i kept, so Black, Green with White stripe, Yellow, and Green, with the remaining two wires without a connector going directly to the distributor being the Orange and Violet wire. While the letters underneath (B, G/W, Y, G) are the colours of the wires when they come out of the ICM before the connector so, Black with Green stripe, Green, Red, and White.
I drew the starter relay how it appears when viewing straight on. The 'hub' is the positive post feeding the rest of the jeep and is connected to the two red wires coming out of the factory style alternator as well as the battery. I have maintained all of the fusible links at this post. Relay connection 1 goes to the + side of the coil when the key is in the start position, connection 2 is connected to the starter solenoid, and connection 3 is connection to the ICM along with the ignition wire that has 12v in the start only position.
The ignition wire with 12v in the ON and Start position is connected to the Yellow or Red wire at the ICM along with the alternator resistance wire.
The (-) Side of the coil is connected to the Green with White stripe or Green wire at the ICM along with the wire that runs to the tachometer.
I was using the original ICM to test everything but fearing I totally fried it I switched to the new one and tried the current wiring setup without it being able to start.
I also tried reversing the coil connections but that did nothing.
I ensured the starter relay was grounded properly which it is since the starter will activate when attempting to start.
I verified I have 12v in the ignition ON/START wire, as well as 12v in the START ONLY wire when the key is in the start position
I used an inline spark tester to confirm I am not getting any spark at the plug
The ignition coil is new last year and since it still started before I ripped the wires out I have no reason to believe it is the problem
To simply further, the colours coming out of the new ICM are Black, White, Orange, Violet, Red, Green.
Any help figuring this out would be greatly appreciated!
Brent
