Park lights turn on when I brake? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

cochino12 · 12-08-2004, 06:25 PM

allright when I brake my parklights are lighting up now? I also noticed my horn and turn signals have suddenly stopped working? Where the heck to I even start checking for problems? Thanks in advance for any help

PHOENIX · 12-08-2004, 06:39 PM

I would check all outside lights to make sure they are working.
Is your flasher bad?
When you have your hazards on and you brake the turn signals stay light (they stop flashing), then when you release the brake pedal they flash again.
If fuses are good I would try replacing the flasher with a known good one.

piecesparts · 12-08-2004, 08:20 PM

LOOK FOR A BAD GROUND CIRCUIT. The brake lights are searching for a ground and are feeding through the bulbs to get it.

Pilgrim · 12-08-2004, 08:59 PM

My 68 had the same problem. I grounded the bed to the frame and the problem disappeared.

Apache · 12-09-2004, 08:47 AM

Most likely a bad ground or fuse, letting it backfeed thru the bulbs. My grandpa's truck recently acted up like that. Everytime he pressed the brakes his dome light would come on which was really odd. And his brake lights were'nt working. He changed a fuse and checked a ground and got it working. Ive also heard that a bad bulb can make stuff act funny like that? Like a tail light burnt out making both quit working??? Thats what ive heard.

*1972C10* · 12-10-2004, 06:25 AM

I had a bulb blow one time one of the filaments landed on the other one and it light up the tail lights when i stopped.. Check your rear bulbs .

cochino12 · 12-10-2004, 02:11 PM

Ok I am an idiot. After all the searching for grounds, broken wires, bulbs etc. it turns out that the hazard button was on but it doesnt flash so I didnt know it was on. Thanks for all the replies

PHOENIX · 12-13-2004, 01:39 PM

Was the flasher bad?
Because these trucks share a brake and signal light in the back the flashers do not flash when the brake light is on. This kind of sucks, but not much that can be done because the bulb is shared.

cochino12 · 12-13-2004, 01:48 PM

Quote:

Originally Posted by PHOENIX

Was the flasher bad?
Because these trucks share a brake and signal light in the back the flashers do not flash when the brake light is on. This kind of sucks, but not much that can be done because the bulb is shared.

Yes the flasher's bad, thats why I didnt know they were on.

PHOENIX · 12-13-2004, 01:51 PM

My flasher caused me many headaches a few years back.

12-08-2004, 06:25 PM	#1
cochino12 It followed me home? Join Date: Mar 2003 Location: Yup Posts: 5,751	Park lights turn on when I brake? allright when I brake my parklights are lighting up now? I also noticed my horn and turn signals have suddenly stopped working? Where the heck to I even start checking for problems? Thanks in advance for any help __________________ Adam That's why they call it a shortcut Kyle, if it was easy it would just be the way. 86 c-10 SWB 85 CCSB 90 GMC K30 Crew SRW 1985 C30 Dually

12-08-2004, 06:39 PM	#2
PHOENIX Registered User Join Date: Oct 2002 Location: Phoenix, Arizona Posts: 4,703	I would check all outside lights to make sure they are working. Is your flasher bad? When you have your hazards on and you brake the turn signals stay light (they stop flashing), then when you release the brake pedal they flash again. If fuses are good I would try replacing the flasher with a known good one. __________________ * AVOID: LOPER'S PERMORANCE / LOPERSPEED.COM OF PHOENIX, AZ & COTTMAN TRANSMISSION *

12-08-2004, 08:59 PM	#4
Pilgrim Registered User Join Date: Mar 2003 Location: Crescent City, FL Posts: 492	My 68 had the same problem. I grounded the bed to the frame and the problem disappeared. __________________ Bob 68 C20 Camper Special

12-09-2004, 08:47 AM	#5
Apache Registered User Join Date: Jun 2004 Location: South Carolina Posts: 419	Most likely a bad ground or fuse, letting it backfeed thru the bulbs. My grandpa's truck recently acted up like that. Everytime he pressed the brakes his dome light would come on which was really odd. And his brake lights were'nt working. He changed a fuse and checked a ground and got it working. Ive also heard that a bad bulb can make stuff act funny like that? Like a tail light burnt out making both quit working??? Thats what ive heard. __________________ 54 Chevy Bel Air 4dr powerglide 54 Chevy SWB 58 Chevy Big Window SWB Fleetside project 58 Chevy LWB 235/4spd 76 Chevy Nova 350/TH350 4.88's *10kmiles on "new" engine 79 Chevy 4x4 SWB 350/4spd 3/4 ton 81 Mazda RX7 84 F@!d Mustang 96 F@!d Ranger 2.3L/5spd

12-10-2004, 02:11 PM	#7
cochino12 It followed me home? Join Date: Mar 2003 Location: Yup Posts: 5,751	Ok I am an idiot. After all the searching for grounds, broken wires, bulbs etc. it turns out that the hazard button was on but it doesnt flash so I didnt know it was on. Thanks for all the replies __________________ Adam That's why they call it a shortcut Kyle, if it was easy it would just be the way. 86 c-10 SWB 85 CCSB 90 GMC K30 Crew SRW 1985 C30 Dually

12-08-2004, 08:20 PM	#3
piecesparts Parts and more parts Join Date: Nov 2003 Location: Lebo, Kansas (middle of nowhere Posts: 6,821	LOOK FOR A BAD GROUND CIRCUIT. The brake lights are searching for a ground and are feeding through the bulbs to get it.

12-10-2004, 06:25 AM	#6
1972C10 Account Suspended Join Date: Dec 2003 Location: Texas Posts: 2,686	I had a bulb blow one time one of the filaments landed on the other one and it light up the tail lights when i stopped.. Check your rear bulbs .

12-13-2004, 01:39 PM	#8
PHOENIX Registered User Join Date: Oct 2002 Location: Phoenix, Arizona Posts: 4,703	Was the flasher bad? Because these trucks share a brake and signal light in the back the flashers do not flash when the brake light is on. This kind of sucks, but not much that can be done because the bulb is shared. __________________ * AVOID: LOPER'S PERMORANCE / LOPERSPEED.COM OF PHOENIX, AZ & COTTMAN TRANSMISSION *

12-13-2004, 01:51 PM	#10
PHOENIX Registered User Join Date: Oct 2002 Location: Phoenix, Arizona Posts: 4,703	My flasher caused me many headaches a few years back. __________________ * AVOID: LOPER'S PERMORANCE / LOPERSPEED.COM OF PHOENIX, AZ & COTTMAN TRANSMISSION *



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