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We are privately owned, with access to a professional Diesel Mechanic, who can provide additional support for Dodge Ram Cummins Diesel vehicles. Many detailed information is FREE and available to read. However, in order to interact directly with our Diesel Mechanic, Michael, by phone, via zoom, or as the web-based option, Subscription Plans are offered that will enable these and other features.  Go to the Subscription Page and Select a desired plan. At any time you wish to cancel the Subscription, click Subscription Page, select the 'Cancel' button, and it will be canceled. For your convenience, all subscriptions are on auto-renewal.

Headlight switch kills engine

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Hello. Checking to see if anyone has also experienced this. With engine running, attempt to turn headlights on and engine dies, as if it were a kill switch, and will not start. Some research suggested to remove park lamp fuse. It worked, but now no running lights except headlights. Brakes and hazards do work, but my concern is with tail/marker/license plate and front ambers. Can this be as easy as a bad ground or am I looking at a full ECM replacement again? Thanks , DRG

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It is likely to be a poor connection in either the grounding circuit or the supply circuit.  In either situation, a poor connection can become worse when another electric load is turned on (the headlights in your case).  Definitely check out all ground connections to body, frame, and engine as well as battery cables  - both positive and negative.

 

- John 

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If you grab the FSM from the download section it will list the ground locations. Also don't over board with grinding paint off everything. A rusty surface can be worse than a painted surface.

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Welcome To Mopar1973Man.Com LLC

We are privately owned, with access to a professional Diesel Mechanic, who can provide additional support for Dodge Ram Cummins Diesel vehicles. Many detailed information is FREE and available to read. However, in order to interact directly with our Diesel Mechanic, Michael, by phone, via zoom, or as the web-based option, Subscription Plans are offered that will enable these and other features.  Go to the Subscription Page and Select a desired plan. At any time you wish to cancel the Subscription, click Subscription Page, select the 'Cancel' button, and it will be canceled. For your convenience, all subscriptions are on auto-renewal.