Gravelguy413 Posted November 1, 2021 Share Posted November 1, 2021 1996 RD all mechanical. Having problem with no tail lights when headlights are on. All brake lights and turn signals working. Periodically I will lose power to tach, fuel gauge, wipers, blower motor etc while driving. These things will stop working and then turn back on. Also sometimes turn signals work but the beeping noise doesn’t come on. I turned my headlights on this morning and the tail lights came on. I swapped relays and they quit working. I put original relay back in and they will not turn on. Any ideas? Does the key switch have anything to do with this ? sometimes I have to turn it 2-3 times until the truck will turn over. Quote Link to comment https://www.bigmacktrucks.com/topic/68623-intermittent-electrical-problem/ Share on other sites More sharing options...
Joey Mack Posted November 1, 2021 Share Posted November 1, 2021 I suggest you check the ground wires inside the dash, left side and right side by the fuse panel. also there is an accessory relay under the center section of the dash, you hear a loud click/bang when you turn the key on... this relay is similar to a riding lawn mower starter relay, or may look like a Ford starter relay, check the connections and ground. if you pull the ashtray out, you may be able to see it with a light. good luck, please post youre findings,, jojo 1 Quote Link to comment https://www.bigmacktrucks.com/topic/68623-intermittent-electrical-problem/#findComment-482264 Share on other sites More sharing options...
Joey Mack Posted November 1, 2021 Share Posted November 1, 2021 when you park it, leave it running and wiggle the key before you shut it down to try and duplicate the issue with the switch. you said "fully mechanical" so you have a "pull stop" to shut it down? jojo Quote Link to comment https://www.bigmacktrucks.com/topic/68623-intermittent-electrical-problem/#findComment-482265 Share on other sites More sharing options...
Gravelguy413 Posted November 1, 2021 Author Share Posted November 1, 2021 Yes I have a fuel shut off pull knob. I will check those grounds tomorrow and try wiggling the key. If nothing I will replace that relay I guess Quote Link to comment https://www.bigmacktrucks.com/topic/68623-intermittent-electrical-problem/#findComment-482268 Share on other sites More sharing options...
Joey Mack Posted November 1, 2021 Share Posted November 1, 2021 are the batteries connected good? The truck you have has a pretty simple electrical system, so I feel like it will be a "loose" connection, rather than a 'paychecks' worth of parts thrown at it.. jojo Quote Link to comment https://www.bigmacktrucks.com/topic/68623-intermittent-electrical-problem/#findComment-482270 Share on other sites More sharing options...
Mark T Posted November 1, 2021 Share Posted November 1, 2021 Miss'n a ground somewhere 1 Quote Link to comment https://www.bigmacktrucks.com/topic/68623-intermittent-electrical-problem/#findComment-482271 Share on other sites More sharing options...
Gravelguy413 Posted November 1, 2021 Author Share Posted November 1, 2021 Ok will check for loose connection and go from there Quote Link to comment https://www.bigmacktrucks.com/topic/68623-intermittent-electrical-problem/#findComment-482272 Share on other sites More sharing options...
Gravelguy413 Posted November 2, 2021 Author Share Posted November 2, 2021 It ended up being the headlight switch I guess. Somebody had the wrong one in there and the contacts were the wrong type and didn’t make a solid connection. I put an OEM one in there and everything is working now Quote Link to comment https://www.bigmacktrucks.com/topic/68623-intermittent-electrical-problem/#findComment-482326 Share on other sites More sharing options...
Joey Mack Posted November 2, 2021 Share Posted November 2, 2021 That's what I'm talkin 'bout!!!! Jojo Quote Link to comment https://www.bigmacktrucks.com/topic/68623-intermittent-electrical-problem/#findComment-482327 Share on other sites More sharing options...
Gravelguy413 Posted November 2, 2021 Author Share Posted November 2, 2021 Oh hell yah! This site has kept me out of the shop at least half a dozen times, thanks for the help really appreciate it Quote Link to comment https://www.bigmacktrucks.com/topic/68623-intermittent-electrical-problem/#findComment-482330 Share on other sites More sharing options...
Joey Mack Posted November 2, 2021 Share Posted November 2, 2021 That's great!! I'm only here a year and a half, but it was obvious from the start that guy's like us need to be here... Jojo Quote Link to comment https://www.bigmacktrucks.com/topic/68623-intermittent-electrical-problem/#findComment-482331 Share on other sites More sharing options...
tjc transport Posted November 3, 2021 Share Posted November 3, 2021 10 hours ago, Joey Mack said: That's great!! I'm only here a year and a half, but it was obvious from the start that guy's like us need to be here... Jojo or in a mental hospital............ 1 Quote when you are up to your armpits in alligators, it is hard to remember you only came in to drain the swamp.. Link to comment https://www.bigmacktrucks.com/topic/68623-intermittent-electrical-problem/#findComment-482350 Share on other sites More sharing options...
Joey Mack Posted November 7, 2021 Share Posted November 7, 2021 Quote Link to comment https://www.bigmacktrucks.com/topic/68623-intermittent-electrical-problem/#findComment-482546 Share on other sites More sharing options...
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