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73-87 Chevy _ GMC Trucks => Electrical => Topic started by: 85-bowtie on April 06, 2010, 01:01:47 PM
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Ok, I'll start off by saying this is on my 85 C-10, but the wiring harness that is in the truck is out of a 91 Suburban. So for the sake of argument, we are basically dealing with a 91 burb. ;D
Well, the truck has gone through a complete tear down and now is getting to the point that it will need to be taken to town for alignment and paint, so the lights need to work.
Basically all of my lights work, bulbs are good brake, tails, and turn bulbs all light up. Now here is my issue, my hazzards flash normally, but my turn signals just light up and stay solid, lacking in the flash department. lol. Any ideas where to start? The flasher is good, I swapped it for the one in my dad's Dakota tonight and it works fine in there, but still nothing in mine. Everything worked prior to tearing the truck down a year ago.
Thanks,
Nick
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Wiggle the bulbs while they are in their sockets. Something similar happened to my truck and that's how I got it to work.
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I just went and wiggled every bulb and still the same.
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Just a guess, but could you have put the wrong bulbs in?
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1157's in the rear for brake/turn, and 3157's in the front
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Are the sockets also off the '91 burb? Check this out: http://www.sylvania.com/ConsumerProducts/AutomotiveLighting/LampReplacementGuide/AutoLRG-Results.htm (http://www.sylvania.com/ConsumerProducts/AutomotiveLighting/LampReplacementGuide/AutoLRG-Results.htm)
It says 3057 in the front and 2057 in the rear. I don't know bulb numbers too well, so I don't know what the difference is really. Might be worth a look.
edit: that link didn't work (sorry). Sylvania's website will show a list though if you tell it the make/model/year.
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Are all of the lighting up? are all of them flashing?
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Are all of the lighting up? are all of them flashing?
+1. You had mentioned that your hazard lights work. The same lights will flash.
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check the ground. mine did the same thing and i just ran a new ground to the frame.
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Did you check the hazard flasher or the turn signal flasher?
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Are the sockets also off the '91 burb? Check this out: http://www.sylvania.com/ConsumerProducts/AutomotiveLighting/LampReplacementGuide/AutoLRG-Results.htm (http://www.sylvania.com/ConsumerProducts/AutomotiveLighting/LampReplacementGuide/AutoLRG-Results.htm)
It says 3057 in the front and 2057 in the rear. I don't know bulb numbers too well, so I don't know what the difference is really. Might be worth a look.
edit: that link didn't work (sorry). Sylvania's website will show a list though if you tell it the make/model/year.
Sorry, I double checked an they are in fact 3057's in the front, but I still have the 1157's in rear. The bed section of the taillight harness is original to my 85. All of these worked in harmony until this last tear down.
Yes all of the bulbs light up. The same bulbs flash when the hazzards are on, but just not as turn signals.
I went through my grounds last night, cleaned them up and made sure connections were tight.
Is there more than one flasher? I only found the one on the fuse panel, I assumed that they both used the same one.
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http://forum.73-87chevytrucks.com/smforum/index.php?topic=11766.0
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Not 100% sure but I think there is 1x relay for the indicators and 1x relay for the 4way flashers?
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I just re-read his original post. It's a 91 Suburban fuse panel and wiring harness. #1 check the turn signal fuse!
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Sorry - a '91 is too new for me! ;)
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I just re-read his original post. It's a 91 Suburban fuse panel and wiring harness. #1 check the turn signal fuse!
1st thing I checked actually. Thanks though. About the only thing I can think of is maybe the canceling cam in the column is bad. I picked up a new one, it's just finding the time to get it dropped in. I think I've gone through everything else at this point.
Nick
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Before you do all that work to put it in just unplug the harness at the base of the column and plug in the new one and see what happens. Also did your lights never work once you did the swap or did they just fail? I know when I swapped my column granted its for the older one but the harness from the column to the fuse panel I guess didn't want to match right up so it took some filing to get them to plug in then once it did it still took some playing with to get everything to work right I even think at one point only one side was working and 4 out of the 4 corners was working. It’s just a though
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If you manually operate the signals do they work? Do the dash indicators light up?
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They worked just fine before the truck was converted to a short bed. And the dash indicators come on as well, I could sit in the cab and click them off and on to "simulate" the signals, as all exterior lights light as well.
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I don't know why but I never even thought about just plugging the cam in without putting it in the column. Duh! ;D I'll try that 1st before tearing it all down. Thanks.
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So if you click it left the left side only turns on but is solid? if that's the case I don't see the cam being the problem more like flasher or a ground
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Try another flasher by application.
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So if you click it left the left side only turns on but is solid?
Exactly. Turns on but it stays solid. I grabbed the flasher out of my dad's dakota and it didn't change anything.
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2057 bulbs in the rear 168 bulbs for the corners 3057 bulbs in the front. Make sure they all match. The flasher should be by application for the suburban.
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Ok I figured it out guys. I feel like an idiot now though. It was just the flasher. The one out of the truck and the one in dad's dakota are both 552 flashers. They both work in his dakota, just not in my truck. I went ahead and got a new flasher anyways and low and behold they work fine now. ;D Thanks for all of the help guys, I really appreciate it.
Nick
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Since you resolved your problem I would like to ask a similar one. My turn signals all functioned properly. Last week, I turned on the flashers when I hopped out of the truck for a minute. When I turned them off, the left front turn signal and indicator light in the dash remained blinking. They will blink any time the turn signal fuse is in, regardless of the key position. The flashers still work properly. When you work the turn signals they will light up properly, but the left front turn signal and dash bulb will remain blinking no matter if the turn signal switch is left, right, or center. Any ideas?
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Check the turn signal switch
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Check the blinker fluid.