john portala Posted October 17, 2020 Report Posted October 17, 2020 does any know when headlight relays first put on dodge autos? John Quote
sidevalvepete Posted October 17, 2020 Report Posted October 17, 2020 Can make a start to this answer. My 38 Shop Manual has no relay, headlights or horn in wiring diagram so is sometime after 1938. Quote
desoto1939 Posted October 17, 2020 Report Posted October 17, 2020 39 Desoto did not have relays for lights. They did have a relay of selinoid for the overdrive units so I guees that would qualify. But no specific relay for lights. When people converted over to 6v sealed beam for the cars made before 1940 they then put in relays to help with the sealed beams. rich Hartung Desoto1939@aol.com Quote
Dodgeb4ya Posted October 17, 2020 Report Posted October 17, 2020 Dodge never used HL relays probably till the 90's or later in the import chassis cars. Quote
Frank Elder Posted October 17, 2020 Report Posted October 17, 2020 I don't know when it started but I know if you put a 30 amp on there you should take a lot of heat out of your headlight switch less chance of your car burning down I got mine from RadioShack but they're bankrupt now unfortunately. Quote
MarcDeSoto Posted October 18, 2020 Report Posted October 18, 2020 Old Mopars had horn relays. But the headlights and parkings light had junction blocks mounted on the inner panel where the wiring would go before going to the lights. Then a shorter length of wire would go the lights from those junction blocks. Quote
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