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Old 12-03-2020, 11:28 PM   #1
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Electrical connection near radiator

I have a 2004 r20 chassis with the radiator in the rear. About 2/3 the way up the right side of the radiator is a cover with a 6 or 8 pin receptical under the cover.

Anyone know what it is for? Could it be to add auxilliary cooling fans?
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Old 12-04-2020, 05:53 AM   #2
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I have a plug in our rear radiator DP (Freightliner chassis) that has a covered plug just above the radiator. It is for connecting to the engine control module. I would hazard a guess that your connection does the same thing, which allows someone diagnosing a problem to be near the motor. I also have one under the dash as well, which you might also have.
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Old 12-04-2020, 07:45 AM   #3
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The one at the engineer is round. Ir is not shaped like the OBD2 PORT on the bottom of the steering column. Unless Cummins uses a proprietary port for testing at the engine.
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Old 12-04-2020, 11:15 AM   #4
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Trucks use a round diagnostic plug so it could be for the engine. It's not proprietary to Cummins. Does it have kind of a twist on plug?
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Old 12-04-2020, 02:30 PM   #5
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Quote:
Originally Posted by David 70 View Post
Trucks use a round diagnostic plug so it could be for the engine. It's not proprietary to Cummins. Does it have kind of a twist on plug?



Yes it is.
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