Jayden S Posted February 21, 2022 Report Share Posted February 21, 2022 Hello all, I have my 1940 Roadking I got running on Saturday and all the lights worked and the Motorola worked when it was parked in August now In February I have no headlights or tail lights along with interior light or radio. I’ve changed both fuses under dash with no luck. Any ideas would be extremely helpful. Thank you. Quote Link to comment Share on other sites More sharing options...
andyd Posted February 22, 2022 Report Share Posted February 22, 2022 Have you checked the headlight switch as far as power in and out thru the connections on the switch?...........also does the power for the radio come from the headlight switch?.......my Oz 1940 Dodge is Plymouth based and I would think its headlight switch is the same as yours so I'd be checking the switch....they can be disassembled if you are careful and check the contacts inside..............andyd Quote Link to comment Share on other sites More sharing options...
Jayden S Posted February 22, 2022 Author Report Share Posted February 22, 2022 Andyd I’m not sure if it’s through the same switch. When they both worked I could use the radio without having the lights on Quote Link to comment Share on other sites More sharing options...
Johnboy Posted February 22, 2022 Report Share Posted February 22, 2022 I also have a 1940 Plymouth. My radio and my lights use the same power wire. What Andyd was saying to check the power that goes to your light switch The power wire connects to the light switch and to the radio. I would also check the wires on your starter solenoid to see if loose. I have had new fuses that were bad check with a meter Quote Link to comment Share on other sites More sharing options...
desoto1939 Posted February 22, 2022 Report Share Posted February 22, 2022 Did you check the battery connections? The battery might be dead. Did you check the amount of fluid in the battery and also test how much electrolite you have in each cell. Sounds as its a bettry issue tighten all leads and cable. Good starting point. was the key left on and not in the off position? Check you wires fromt he geberator to the volt regular make sure nothing is loose or broken Rich Hartung desoto1939@aol.com 1 Quote Link to comment Share on other sites More sharing options...
greg g Posted February 23, 2022 Report Share Posted February 23, 2022 A simple circuit probe with a light can be your friend here, as can a jumper wire that allows you to bypass suspect portions of circuits by powering the loads directly from the battery to see if bulbs , horns, accessories work independent of their switches, fuses, circuit breakers, relays, and wire harness. Problem could have a bit of corrosion preventing good connections. The dimmer switch is an example where infrequent use causes resistance from power to load. Cycle both headlamp and dimmer switches quickly for several cycles works in many cases to restore performance of the circuits. Quote Link to comment Share on other sites More sharing options...
Dan Hiebert Posted February 24, 2022 Report Share Posted February 24, 2022 Ditto Greg's recommendations. It can be surprising how quickly just enough corrosion or crud to affect the circuit(s) can build up, especially when one of these old cars sit for a while. Could have had some in there already that was on the verge of causing failure, and these last few months just pushed it over the edge. Grounds tend to be the culprit most of the time. Quote Link to comment Share on other sites More sharing options...
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