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Old 09-11-2006, 08:55 AM
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Turn signal keeps coming on, but not blinkin

Well, been on the engine board for 2 years but this is my first post on this one.

I have a '77 chevy truck. 2 days ago, driving at night, my right TS indicator light, along with the right front and right rear turn signal bulbs, begun coming on randomly, then going out. They are NOT blinking, just coming on. Only happens when the lights/parking lights are on, never during the day when they are off. There is no decernable frequency to this, as in not after hitting a bump, not when turning or braking, no pattern that I can find. I even sat in the driveway last night and they came on, then went off,,,,,then came on,,,,,,then off, just random times. TS switch is original but works fine. If the lights come on, I can hit the signals and they work fine, but the stupid lights still keep randomly coming on and off.

Any ideas? LOL

Mark

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Old 09-11-2006, 09:11 AM
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grounding

ground motor to body
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Old 09-11-2006, 01:17 PM
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sounds like one of your light sockets is corroded and not getting the proper ground.
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Old 09-11-2006, 03:12 PM
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Do you have a tilt wheel??

May have a damaged wire inside the column.
I have had a situation where the brake/turn would only light up with the wheel down all the way.

Bryan
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Old 09-11-2006, 03:23 PM
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Most oddball stuff like that is a grounding problem most of the time.
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Old 09-11-2006, 03:29 PM
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TS indicator light

Mine did that it turned out to be a bad bulb 1157 duel element one element shorting to the other intermittently thus it only happened when the parking lights were on. Required a lot of tail chasing to get to the bulbs. IIRC when it failed the TSI on the dash wasn't on as bright as it was when the signal was on blinking a turn.

BarryH
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Old 09-11-2006, 04:37 PM
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Doc here,

Bible...4 oz Bottle of Holy Water...Silver Cross..Priest....and recite these Words...while sprinkling Holy Water on the turnsignal switch.."Be Gone Thy Queertrons from this system, and halt Thy Fuse blowing.." "In thy name of Harley Earl..Leave this GM Automobile in Peace"...

AND if that doesn't do it..

Try pulling the harness plug at the bottom of the steering column, inspect, clean and burnish ALL pins on both connectors and inspect for bent, or burned pins..

After that is done, Inspect the turnsignal switch..It may be the right-side spring return (a piece of spring steel that rides on the plastic select switch return) may be worn and the right side turn selector may be "Riding " on the switch with just enough pressure to engage the system intermittently..

If that checks out..remove the flasher..try and duplicate the problem..If you can, the power-source is from the park lamps not the signal system, troubleshoot there.

Doc
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Old 09-11-2006, 08:09 PM
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Hmm. looks like its leading to the TS switch, which I had out 2 weeks ago to tighten up the tilt column. Those stinking 4 bolts are fun to get to!

I was thinking of changing the switch anyways since its only 30 years old! LOL Goody,

I'll ck the right side bulbs first and ck the harness's too. Odd thing is its never on the left side, just the right.

Mark
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Old 09-11-2006, 08:20 PM
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Doc here,

Yeah..Do the easy stuff first..and eliminate that..when you get to the turnsignal switch blessing..

stand back..

they have been known to spit pea soup...and bellow in tongues..

They are a PITA.. you might just consider it a done deal anyway (even if it isn't the problem..) ..since as you say..It is 30 years old and your in there anyway..

Doc
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Old 09-11-2006, 11:25 PM
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Hi Doc....

I just ran to QT for some cupcakes and the darn thing came on and off the entire time. I sat in the driveway when I got home and tried different things, but still found no common denomonator. I got under the dash and pushed pulled wiggled and yanked on the TS harness and plug but it made NO difference one way or the other. One odd thing I did notice as with the lights ON and engine OFF, the right side lights and indicator flickered when acting up but as soon as I turned the key back on, they came on constant, then finally went out, then back on. Seems that I"m getting a power feed from somewhere that I shouldn't be. Guess this weekend will be fun! I hate electrial problems!! LOL

Mark
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Old 09-12-2006, 08:50 PM
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Well, the gremlin has been found!!!

RF TS socket was loose in the bucket. The centering ring on the socket had broken and one of the 3 tangs that clips into the bucket had shifted off the bucket which left the other 2 loose creating a intermittant ground. Got it wiggled back into position and its all better, might even last another 30 years! LOL or I guess I could just fix it!

Mark
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Old 09-12-2006, 09:23 PM
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yay

Bryan
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Old 09-12-2006, 09:42 PM
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YaY indeed!!! That thing was driving me batty watching it come on and off all the time. Still may change out the TS switch since it is cracked and the handle wiggles alot on a right turn activation, but then again, don't want to rush into anything too fast,,,,,been broke for atleast 10 years now! LOL
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Old 09-12-2006, 10:14 PM
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Doc here,

KEWL! Glad to hear it's fixed..

I like your thought process..same as mine when asked:"How long will it take you to fix it?" , standard answer.."I Dunno...How long did it take you to break it?"...

Doc
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Old 09-13-2006, 12:21 PM
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Yep, nice to have that problem fixed. Next I have to pull the column apart on my wifes '86 Caprice and tighten up those nasty 4 bottom bolts! Then have the base plate on her qjet re-bushed and finally after 20 years do a clean and refresh on it. Never had it apart since day one! Gotta love the qjet!
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