Bench test ignition module?
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Senior User
Joined: Dec 2018
Posts: 152
Likes: 3
From: NEPA
Bench test ignition module?
'77 F250 351M. Truck wouldn't start this morning so I Ohmed the coil got 1.6 primary and 8300 secondary so went and got a new one and a cheap chinese ICM as a "just in case behind the seat emergency fixer". Installed the new coil still no start so installed the chinese ICM and she started right up.(?). Is there a way to put a meter to the old Motorcraft ICM to see if its any good? Hate to toss it in place of a chinese el cheapo model!!!
Cargo Master
Joined: Oct 2016
Posts: 2,738
Likes: 217
From: Northern VA
Swap it back in see if it works? The problem with these seems to be cracking solder joints from excess heat. You theoretically could repair that module just by reflowing solder. Always carry spare module if you put the old back in....
Laughing Gas
Joined: Nov 2013
Posts: 1,207
Likes: 60
From: S.E. Louisiana;so far USA
'77 F250 351M. Truck wouldn't start this morning so I Ohmed the coil got 1.6 primary and 8300 secondary so went and got a new one and a cheap chinese ICM as a "just in case behind the seat emergency fixer". Installed the new coil still no start so installed the chinese ICM and she started right up.(?). Is there a way to put a meter to the old Motorcraft ICM to see if its any good? Hate to toss it in place of a chinese el cheapo model!!!
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