Turn signals don't work... Please help! - Vintage Mustang Forums

 
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post #1 of 10 (permalink) Old 05-31-2012, 12:40 AM Thread Starter
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Turn signals don't work... Please help!

I have a 1970 Mustang Mach 1. The emergency flashers/lights work fine but the left/right turn signals dont work. Car recently purchased, turn signals never worked. All bulbs in tail lights and front lights are in working order when the emergency flashers are activated. Checked the fuses, they all are good. Replaced turn signal flasher unit under dash with new one and turn signals still don't work. I even plugged the emergency flasher unit into turn signal flasher connector and turn signals still dont work. Not sure if turn signal switch on steering column is good or bad. Anyone have any suggestions as to how to troubleshoot further? Frustrating problem...
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post #2 of 10 (permalink) Old 05-31-2012, 01:23 AM
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Seems like you've eliminated all possibilities except the TS switch.

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post #3 of 10 (permalink) Old 05-31-2012, 07:35 AM
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Have you checked to see if you have power on both sides of the fuse? Fuse may be good, but if there is no power to go through it, well you see my point. I would assume since the emergency flashers work, that your brake lights work. What happens when you activate the turn signals? Does the turn signal come on but not flash?
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post #4 of 10 (permalink) Old 05-31-2012, 03:50 PM
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Another common source of this symption is a defective Hazzard switch. Your turn signal wiring/circuits pass thru this switch. Sometimes the contacts (inside switch) will work for one but not the other (either signals or emergency). Try turning your turn signal on (either side), and while it's ON, slightly move the Hazzard switch in/out to see if your turn signal starts to working.
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post #5 of 10 (permalink) Old 05-31-2012, 11:33 PM Thread Starter
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When I activate the turn signals, either left or right nothing happens at all. Brake lights and emergency flashers (hazzard) work. I will check the emergency hazzard switch and check your recommendation. I am traveling now and will check this weekend. Thank you!
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post #6 of 10 (permalink) Old 06-01-2012, 09:50 AM
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TS switch


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post #7 of 10 (permalink) Old 06-12-2012, 01:18 AM
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Babdiver, did you ever figure out what the issue was? I'm having the same issue in my 67. Like you, I replaced the flashers and the fuses are fine. I just replaced the turn signal switch today...... still no left/right signal...emergency lights still work fine.

PrecisionTrans, how do I check the power on either side of the fuse? How do I determine if there's any power going through the fuses?
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post #8 of 10 (permalink) Old 06-12-2012, 11:35 AM
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Bump............
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post #9 of 10 (permalink) Old 06-12-2012, 12:43 PM
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Kurupt 03,

Probe both sides of the fuse with your voltmeter or test light; with the key on, of course.
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post #10 of 10 (permalink) Old 06-12-2012, 03:24 PM
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Remove the flasher and check for 12V with the key in the ON position on one of the terminals. If so, the flasher is probably defective. If not, something wrong with the feed to the flasher. If neither turn signal indicator lights, another indication that flasher or feed is bad. If indicators light, but do not blink, check front and rear for a bulb blown, bad ground, etc.
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