Matt king Posted February 22, 2018 Share Posted February 22, 2018 I have a 93 Mack model RD690S WITH a electrical malfunction light 1-7 Coolant level sensor. Changed sensor filled coolant tank and light still flashes same code is there something I'm missing? Quote Link to comment Share on other sites More sharing options...
0 Mackpro Posted February 22, 2018 Share Posted February 22, 2018 Does the sensor screw directly into the radiator or is it in a surge tank up on the fire wall? Also does the sensor have a plug in harness or eyelet and nut style harness Quote Link to comment Share on other sites More sharing options...
0 305Mack Posted January 9, 2019 Share Posted January 9, 2019 I’m having the same issue. Replaced the sensor and code won’t go away. I checked for continuity in the plug and was good. Yet if I use a test light, I can’t seem to get a signal. Quote Link to comment Share on other sites More sharing options...
0 LilMartian Posted January 10, 2019 Share Posted January 10, 2019 Yep, need to know how sensor is done and on the second truck question, not Mackpros answer, what model and all do you have, different years, models, makes a difference. Quote And you thought only NASA had rocket scientist!!!! Link to comment Share on other sites More sharing options...
0 LilMartian Posted January 10, 2019 Share Posted January 10, 2019 305mack is one I’m asking about model, etc Quote And you thought only NASA had rocket scientist!!!! Link to comment Share on other sites More sharing options...
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Matt king
I have a 93 Mack model RD690S WITH a electrical malfunction light 1-7 Coolant level sensor. Changed sensor filled coolant tank and light still flashes same code is there something I'm missing?
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