Lagator Posted August 6, 2013 Share Posted August 6, 2013 New to the forums but I did search for this and didn't see it so here goes..... From the front of my 1985 R model at the junction box there are 4 wires: white = brake and left turn; red = right turn; green = back ups and buzzer; black = clearance lights. I have everything working except a brake light on the right. Also, I want to make clearance lights up high on gate (dump truck) work for brake and turn signal also but not until I get this brake light issue figured out. Any help appreciated! Quote Link to comment https://www.bigmacktrucks.com/topic/32238-brake-light-r-not-working/ Share on other sites More sharing options...
2stacksuperdog Posted August 6, 2013 Share Posted August 6, 2013 Quote Matt Link to comment https://www.bigmacktrucks.com/topic/32238-brake-light-r-not-working/#findComment-198371 Share on other sites More sharing options...
Lagator Posted August 6, 2013 Author Share Posted August 6, 2013 Thank you 2stacksuperdog. Any ideas? Quote Link to comment https://www.bigmacktrucks.com/topic/32238-brake-light-r-not-working/#findComment-198372 Share on other sites More sharing options...
2stacksuperdog Posted August 6, 2013 Share Posted August 6, 2013 Sounds like you just got a brake wire going to the left. If im not mistaken you should have a separate wire for the brakes so you dont have all the lights flashing. Quote Matt Link to comment https://www.bigmacktrucks.com/topic/32238-brake-light-r-not-working/#findComment-198373 Share on other sites More sharing options...
thomastractorsvc Posted August 6, 2013 Share Posted August 6, 2013 is it the bulb? check ground Quote Robert"I reject your reality and substitute my own." Link to comment https://www.bigmacktrucks.com/topic/32238-brake-light-r-not-working/#findComment-198375 Share on other sites More sharing options...
Solution br549 Posted August 6, 2013 Solution Share Posted August 6, 2013 Does the right turn signal work? If it does check the turn signal switch, the brake lights go through the signal switch. Quote Link to comment https://www.bigmacktrucks.com/topic/32238-brake-light-r-not-working/#findComment-198376 Share on other sites More sharing options...
thomastractorsvc Posted August 6, 2013 Share Posted August 6, 2013 I am looking at the wiring harness schematics and drew up a crude map, the light housing grounds to the frame so make sure it has good ground, you can check the red and green to make sure they flash with a test light before you connect.Scan3.pdf Quote Robert"I reject your reality and substitute my own." Link to comment https://www.bigmacktrucks.com/topic/32238-brake-light-r-not-working/#findComment-198382 Share on other sites More sharing options...
Lagator Posted August 8, 2013 Author Share Posted August 8, 2013 Thank you Thomastractorsvc. I will try to isolate the brake from the left turn and apply the rest of your suggestion. Your drawing looks like mine, crude but effective! Quote Link to comment https://www.bigmacktrucks.com/topic/32238-brake-light-r-not-working/#findComment-198635 Share on other sites More sharing options...
thomastractorsvc Posted August 8, 2013 Share Posted August 8, 2013 I would have scanned the whole thing but my scanner is a little to small for the sheet to show up properly. I have had a turn signal not work on the blinker but the park/running light worked I jacked around for couple hours, taking it off, changing the bulb.....did everything except replacing the light housing, it was the ground no matter what I did I could not get that light to flash I eventually added a ground wire and it works fine. Quote Robert"I reject your reality and substitute my own." Link to comment https://www.bigmacktrucks.com/topic/32238-brake-light-r-not-working/#findComment-198639 Share on other sites More sharing options...
Lagator Posted August 15, 2013 Author Share Posted August 15, 2013 Well.....I have changed the light housing, checked grounds, nothing worked to isolate this problem. Under the hood at that junction box I have the same thing going... One brake line at the left blinker. No brake with right flasher. I am going to try the flasher switch next. Ugh. Frustrated to say the least. Quote Link to comment https://www.bigmacktrucks.com/topic/32238-brake-light-r-not-working/#findComment-199920 Share on other sites More sharing options...
thomastractorsvc Posted August 15, 2013 Share Posted August 15, 2013 Check for power from the turn signal maybe the contacts are corroded, on my old b I had to take it apart and clean then I added some dielectric grease and been fine since Quote Robert"I reject your reality and substitute my own." Link to comment https://www.bigmacktrucks.com/topic/32238-brake-light-r-not-working/#findComment-199925 Share on other sites More sharing options...
fxfymn Posted August 15, 2013 Share Posted August 15, 2013 Apply 12V at the junction point under the hood to the turn signal wire. If the bulb lights it is somewhere before the junction; if it doesn't make a long test lead to check for continuity from the bulb to the junction; no continuity = broken wire; continuity = bad ground at light. My bet is the switch itself. Quote Money, sex, and fire; everybody thinks everyone else is getting more than they are! Link to comment https://www.bigmacktrucks.com/topic/32238-brake-light-r-not-working/#findComment-199927 Share on other sites More sharing options...
Lagator Posted August 17, 2013 Author Share Posted August 17, 2013 BR549 had it right. Replaced the turn signal switch and it works like a charm! Actually, as I replaced the TSS I noticed a wire coming out of the steering column and a wire coming out of the wiring harness sleeve that seemed to match up. Hadn't noticed that before so I probably could have just connected that to see if it was the problem but since I already had the new one on......... Lesson learned... Hope this helps someone else out! Thanks for all your help! Time to get her inspected!!!! woo hoo. Quote Link to comment https://www.bigmacktrucks.com/topic/32238-brake-light-r-not-working/#findComment-200107 Share on other sites More sharing options...
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