ccrm

[plumber]

I have 1993 sho mtx. Turns over but no fuel pump noise. I have 12v at #8 & #12 pins. I have 12v at #13 pin only with eec grounded. Should I have 12v on #15 ground too, because I don't get a reading. I grounded the FP test port and the pump ran. I then tried the key and it also ran. Then five minutes later neither would work. My ccrm is FIDF-12B577-BA. I see some end in AA, does it matter. Mine also has a large M on it. Thanks ,any advice would be appreciated. Plumber

 

[sperold]

All the "M" code CCRMs are interchangeable, and luckily, the most common CCRM.

This is from a foggy memory: your overflow bottle low coolant sensor can act-up or fail and it sometimes takes out a small 10 amp fuse in your under hood fuse box. Check those things, but when the fuse goes, you get no fuel pump activity, not intermittent like your situation.
I am sure someone will comment with an explanation of how the low coolant light can take out the fuel pump.

 

[plumber]

All the "M" code CCRMs are interchangeable, and luckily, the most common CCRM.

This is from a foggy memory: your overflow bottle low coolant sensor can act-up or fail and it sometimes takes out a small 10 amp fuse in your under hood fuse box. Check those things, but when the fuse goes, you get no fuel pump activity, not intermittent like your situation.
I am sure someone will comment with an explanation of how the low coolant light can take out the fuel pump.

All the "M" code CCRMs are interchangeable, and luckily, the most common CCRM.

This is from a foggy memory: your overflow bottle low coolant sensor can act-up or fail and it sometimes takes out a small 10 amp fuse in your under hood fuse box. Check those things, but when the fuse goes, you get no fuel pump activity, not intermittent like your situation.
I am sure someone will comment with an explanation of how the low coolant light can take out the fuel pump.

 

[sperold]

Unplug your overflow bottle electrical connection to see if the fuel pump comes back.

 

[plumber]

Unplug your overflow bottle electrical connection to see if the fuel pump comes back.

Thanks but that was ok. I get the pump sometimes to run when I put a testlight between #5 wire leaving the ccrm and ground. The car starts and runs awhile then dies then I won,t get the same reading after. Any ideas . Thank you

 

[thegreatbriguy]

Have M code tested good. Sent you a conversation.