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#1
09-01-2002, 06:27 PM
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Turn signals/Hazard stopped working
My turn signals and hazard lights stopped working this morning on my 1989 420 SEL (126 chassis). After searching the archives on this site, I'm now a little more confused, although I seem to believe that a relay is the problem. The fuses appear to be fine (there are separate fuses for the hazards and the turn signals which are linked with other items like the horn which still works). The wipers, radio, and lights work, too. Does this sound like a relay problem? If so, where can I find it on the car (and how hard is it to get to it), and how much will one run me? Is there one relay which controls both the hazards and the turn signals?
One other thing of note: yesterday I put in a new OEM battery. When it was installed, the aftermarket alarm/flashing lights went off a bunch, maybe blowing out the relay? Or is that just a coincidence? Any help will greatly be appreciated! Tim 
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#2
09-01-2002, 07:18 PM
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Hazard flasher switch contains the flasher within the switch itself; often the culprit. $16.25 from Fastlane. See top of the page.
Assumed you checked bulbs?
__________________
The Golden Rule 1984 300SD (bought new, sold it in 1988, bought it back 13 yrs. later)
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#3
09-02-2002, 01:48 PM
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Okay. Today I toggled the switch a few times as recommended in previous threads and got the signals to come on for a second or two, but then they went off. I have not been able to duplicate since. So I got a used hazard switch from a local independent Mercedes dealer and tried that one, but still no flashers. I even took my old one apart and cleaned the contacts but had no luck. I've probed the cable coming into the switch and it is receiving power. So now what should I do? Is there a relay under the dash that may be the culprit?
Last edited by Tim-in-NC; 09-03-2002 at 05:06 PM.
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#4
09-03-2002, 05:09 PM
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Maybe the used switch I got is broken too?
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#5
09-04-2002, 01:26 PM
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ok, now I'm confused but, if you want to stop by the shop (capital blvd near Adventure landing), we can take a quick look.
Joe 878-7672 Behind The Star Inc.
__________________
Project Smoker, '87 603 powered wagon Hauler, 96 CTD can you say torque? Toy 73 Cougar xr7 convertible Acme Automotive Inc. Raleigh NC 919-881-0364
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#6
09-10-2002, 01:17 PM
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Turns out that the relay (aka control unit) for the turn signals and flasher found under the dash went bad. Cost me $150 for the part and another $140 for the labor. Not good.
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