Turn signals stop working when I turn lights on

jd5077 · Post by **jd5077** » 10 Mar 2012, 09:57

1998 S90.....My 4 way flashers and turn signals work fine until I turn on either the marker lighs or headlights. With the lights on the dash light for the right turn signal stays on continuously no matter where the turn signal is at.Any ideas?

Billc1015 · Post by **Billc1015** » 10 Mar 2012, 11:01

Sounds like you have a bad ground circuit for the lights. I would check all the grounding points on the body/frame to make sure they ate clean and tight and check the bulb sockets to make sure thay are not damaged.

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jd5077 · Post by **jd5077** » 10 Mar 2012, 16:06

Thanks! The two terminals on the right front turn signal bulb melted together.....that's a new one....see pic

Post by **billofdurham** » 11 Mar 2012, 13:14

I haven't seen one that bad before. Is the bulb holder allowing the bulb to move around?

Bill.

Billc1015 · Post by **Billc1015** » 11 Mar 2012, 17:50

That will happen with cheaper bulbs. The contacts are made out of softer metals and the heat of the bulb causes them to melt a bit.

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jd5077 · Post by **jd5077** » 16 Mar 2012, 06:38

Socket is fine....original bulb...98 S90....14 years old.....180k..... I'm just glad it was something simple. Thanks again!

Post by **regent** » 16 Mar 2012, 11:04

I have found melted bulb solder due to local overheating as oxidized surfaces cause the contact resistance to increase.
Prevention: Use non-abrasive methods to clean the contacts (socket and bulb) and then coat lightly with "bulb grease"