Brake and hazard lights not working and windshield wipers only work on high

TONYHEDRICK

MEMBER
1999 CHEVROLET SUBURBAN
5.7L
V8
4WD
AUTOMATIC
194,000 MILES

My windshield wipers only work on high my my brake lights do not come on at all and my hazards do not work. I checked all the fuses and they were good. My lights have corrosion on one side of my truck. I talked to people they say it is the turn signal switch. So I replaced and still no hazards and no brake lights and my windshield wipers still only work on high. Anybody got a idea what it could be?

4 Replies

ASEMASTER6371

MECHANIC
52,797 POSTS

Good morning.

When you say corrosion, where do you mean?

Was there any corrosion at the switch for the turn signal as well as the wiper switch?

Roy

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Monday, April 2nd, 2018 AT 4:14 AM

TONYHEDRICK

MEMBER
2 POSTS

The tail lights have a little corrosion, right where you plug the bulb in. No corrosion any where near the turn signal switch. Could it be my ground? What other signs would I have if it were my ground wire?

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Monday, April 2nd, 2018 AT 10:52 AM

ASEMASTER6371

MECHANIC
52,797 POSTS

The turn signals would not work. Let me get a diagram.

Roy

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Monday, April 2nd, 2018 AT 10:55 AM

ASEMASTER6371

MECHANIC
52,797 POSTS

Okay, attached is a diagram. The turn signal flasher and hazard are a combo flasher but have two feeds. The brake lights also go through the turn signal switch.

There are three feeds to the turn signal switch. Check the fuses with a test light for power on both sides with the key on.

As far as the wipers one of the fuses powers the motor but if that was it, the high would not work. It may be a bad switch or motor.

Roy

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