Metzman510 Posted June 15, 2020 Report Share Posted June 15, 2020 On my 1969 510, the Hazard lights do not work. The turn signals work just fine, which is a separate flasher relay, and the running lights all work. I'm thinking it's either the flasher unit or the switch? The flasher unit is a lot easier to swap out, so I was going to try a NAPA Echlin ECH-MC23016 12V flasher as a replacement. Anyone use that flasher before with good results? Is it common for the Hazard switch to fail? Just curious as I have been slowly working through the electrical gremlins in the car and am curious to other's knowledge and experience. Thanks! Quote Link to comment
datzenmike Posted June 15, 2020 Report Share Posted June 15, 2020 Not usual to fail as they get very little use. Try switching the 4 way on and off 50 times to polish the contacts. Getting little use they might have a little corrosion. Switch the turn with the 4 way flasher unit. If the 4 way unit is bad the turn signals will stop working and the 4 way will start. Quote Link to comment
Metzman510 Posted June 16, 2020 Author Report Share Posted June 16, 2020 Will do! I'll get back to you as soon as I have tried that. Quote Link to comment
Metzman510 Posted June 16, 2020 Author Report Share Posted June 16, 2020 Tracing the wiring on a diagram for the Hazard flasher and switch and I found a device called a "T. S. P. L."? Anyone know what a TSPL is, or where to find it? It could stand for Turn Signal Parking Lamp? It appears to combine the turn signals left and right through a diode or relay? Not sure what it is? All help appreciated! Quote Link to comment
yenpit Posted June 17, 2020 Report Share Posted June 17, 2020 I ALWAYS replace both turn signal & hazard flasher units with heavy duty electronic flasher units........I use Novita #EL12 units, available at AutoZone etc. The turn signal & hazard wiring runs THRU the turn signal switch on the steering column. We find that the electrical contacts can easily be dirty etc with old congealed grease OR worn out/damaged, which could cause electrical issues like this. We soak the electrical part of the turn signal switch in white vinegar for a day or two, then clean well, then check that the contacts are clean, not corroded or worn/damaged. If good, use some dielectric grease on the contacts, lube up the moving parts & re-install! Other issues are bad grounds etc. Hope that helps! Quote Link to comment
Metzman510 Posted June 22, 2020 Author Report Share Posted June 22, 2020 Great advice, Thanks! I did get the Hazards working over the weekend. I noticed that the dome light worked once the car was started, which let me know I had a dirty chassis ground (car running=vibrating=ground contact) so I went and cleaned the major grounds and voila! the Hazards work and the dome light works. Now I need to find the correct location for the horn to mount and the underhood service light... Quote Link to comment
yenpit Posted June 22, 2020 Report Share Posted June 22, 2020 As far as I know, all 510 horns mounted at the lower front of each side of the inner fender wells. There should be two captive nuts per side there, for the OEM horn bracket. PM me your email or text, I can send pics of my 69! TJ Denver CO Quote Link to comment
Metzman510 Posted June 23, 2020 Author Report Share Posted June 23, 2020 Cool, I found the horn mounts, but the horn I have isn't stock, so that looped me. Thanks for the help! Quote Link to comment
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