didjeriDatsun Posted June 18, 2010 Report Share Posted June 18, 2010 my brake lights aren't coming on. Fuses look good. My tail lights and turn signals work. I tried checking to see if the brake switch is bad by pulling the wires at the connectors a few inches from the brake switch and then attaching my continuity tester to the two leads to bypass the switch and I still get no lights. The bulbs are all good (top bulb flashes with signal as does one of the filaments in the middle bulb. Second filament in middle bulb comes on for tail lights. Bottom bulb of course is backup). Shouldn't one of these wires coming to the brake switch be hot all the time? I feel like one of these ought to light up my tester. At least that would tell me that power is getting to there and that my issue would then be with the switch or the ground. Quote Link to comment
banzai510(hainz) Posted June 18, 2010 Report Share Posted June 18, 2010 ck the horn fuse for some reason thats the power for the light switch.alot of people dont know this. see if your horn works if you have them. also common on old datsun is the standard fuse make look good but the solder inside the ends could be bad and its really open circut. your new favorite website, besides this ratsun "How To" section is good here also http://olddatsuns.com/620tech.htm Quote Link to comment
MikeRL411 Posted June 18, 2010 Report Share Posted June 18, 2010 ck the horn fuse for some reason thats the power for the light switch.alot of people dont know this. see if your horn works if you have them. also common on old datsun is the standard fuse make look good but the solder inside the ends could be bad and its really open circut. your new favorite website, besides this ratsun "How To" section is good here also http://olddatsuns.com/620tech.htm I think you have nailed this problem! This is exactly what I found. By the way, if your Datsun is old enough the "Horn" lable on the fuse box cover reads "Corn", I kid you not! Quote Link to comment
didjeriDatsun Posted June 18, 2010 Author Report Share Posted June 18, 2010 yep. you were right on the money. I don't have a horn and my horn fuse was the only one missing. I guess I've been driving it w/o brake lights since I got it back from the engine swap. Just a little overlooked detail. Thanks for the cure. Quote Link to comment
dennis Posted June 18, 2010 Report Share Posted June 18, 2010 Now I am going to have to go down to the garage and see if my fuse panel says Corn on it. Quote Link to comment
inline4 Posted June 18, 2010 Report Share Posted June 18, 2010 oh crap, I didnt know that the horn relay powers the brake lights. I took mine out while I was cleaning things and I didnt put it back in yet :o Quote Link to comment
banzai510(hainz) Posted June 18, 2010 Report Share Posted June 18, 2010 My brakes light didnt work Fuse was good but no power to switch. Wire was broken on back side of the fuse box Quote Link to comment
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