Question about 1979 Ford Bronco

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Not signal turn working

On position signals work, after start...stop working

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Have you tried replacing the flasher, its under the dash.

Posted on Apr 22, 2014

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Can you help me determine what is going on with my car?


Your headlamp problem sounds like a lose connection , need to check the fit of the terminal pins at the headlight connector ! or you have a wire broke inside the insulation or a bad ground wire ! Are both high an low beams inoperable ?
You other light problems are not that easy to say it's this or that ,not when a control module is involved . When the BCM is involved in controlling these thing's the first thing to do would be hook up a professional grade scan tool an check for DTC'S - diagnostic trouble codes , in the bcm no the engine computer ! An then check inputs to the BCM from brake switch , headlamp , turn signal etc... An outputs from the BCM to the components that are not working ! Here is a description of how it works !
Turn Signal Lamps
The body control module (BCM) is responsible for controlling the turn signals and hazard lamps. When the turn signal switch is placed in either the left turn or right turn position, the BCM receives a signal from the turn signal switch. The BCM then sends an on-off voltage signal to either the left or right turn signals and their instrument panel cluster (IPC) indicator. When the hazard switch is pressed, the BCM receives a signal from the hazard switch. The BCM then will send an on-off voltage signal to all the turn signal lamps. All the turn signal lamps will flash including both IPC turn signal indicators.
Stop Lamps
The brake pedal position sensor is used to sense the action of the driver application of the brake pedal. The brake pedal position sensor provides an analog voltage signal that will increase as the brake pedal is applied. The body control module (BCM) provides a low reference signal and a 5-volt reference voltage to the brake pedal position sensor. When the variable signal reaches a voltage threshold indicating the brakes have been applied, the BCM will apply battery positive voltage to the stop lamps, transmission control module (TCM), engine control module (ECM), and stop lamp relay coil side. When the stop lamp relay receives battery voltage from the BCM, the relay coil is energized and the stop lamp relay switch contacts close applying battery voltage through the STOP LP fuse to illuminate the center high mounted stop lamp (CHMSL).
Did you ever spill a drink down the right side of your console or have a windshield leak ! The BCM is located on the right side of the shift console ?

Jul 20, 2015 | 2007 Pontiac G6

1 Answer

Left turn signal stops working


Had simular problem with wife 2000 Jeep Cherookee.
My signal light were not working at all.Check flasher relay under steering colum

Nov 28, 2012 | 2000 Jeep Grand Cherokee

1 Answer

On my 2004 impala, the front right turn signal doesn't work, (only works with hazard lights). And the back right signal is fast. The signal "clicking" sound is non stop but on the other hand...


If the turn signal filament of the right front park/turn lamp is known to be OK and the hazard switch is in the normal position, the hazard switch or the turn signal/multi-function switch could be defective

Oct 16, 2012 | Cars & Trucks

1 Answer

2009 Impala rear lights not working


Turn Signal Lamps
The LT T/SIG and RT T/SIG fuses located in the underhood fuse block supplies battery positive voltage to the body control module (BCM) for turn signal and hazard lamp operation. When the turn signal switch is place in either the LEFT or RIGHT position, ground from G202 is applied through the turn signal switch signal circuit to the BCM indicating the turn signal request. In response to this signal, the BCM applies a pulsating voltage to the front and rear turn signal lamps supply voltage circuits cycling the lamps ON and OFF. The BCM also sends a message via GMLAN to the instrument panel cluster (IPC) to cycle the turn signal indicator ON and OFF depending on the position of the turn signal switch.
Ground for the turn signal lamps is supplied as follows:
• G101 provides ground for the left front turn signal lamp
• G100 provides ground for the right front turn signal lamp
• G302 provides ground for the left and right rear turn signal lamps

The LT T/SIG and RT T/SIG fuses located in the underhood fuse block are also used by the body control module (BCM) for stop lamp operation.
The brake pedal position sensor is used to sense the action of the driver application of the brake pedal. The body control module (BCM) provides both, a 5-volt reference voltage and low reference to the brake pedal position sensor. The position sensor provides an analog voltage signal back to the BCM that will increase as the brake pedal is applied. When the brake pedal is applied, the BCM will then apply battery voltage to the left and right stop lamp supply voltage circuits and the center high mounted stop lamp (CHMSL) supply voltage circuit illuminating the stop lamps. At the same time the BCM signals the transmission control module (TCM) and the engine control module (ECM) that the brakes are applied. Ground for all stop lamps is provided at G302.
The stop lamps on this vehicle will not illuminate unless the ignition is in the accessory, run, or crank positions. When the ignition is in the OFF position the stop lamps will not illuminate when the brake pedal is applied.

Did you check the fuse's. ? Wouldn't think it's a ground because right an left tail lamp Assembly's use same ground ! Did you check for B+ voltage at the bulb. with a volt meter ? Power is supplied by the BCM . Could be the tail lamp assembly

Jul 19, 2017 | Cars & Trucks

1 Answer

2002 ford focus headlights inop


All types of car headlight problem troubleshooting.Click the link below :---All headlights not working? http://repairhelpcenter.blogspot.com/2012/01/all-headlights-not-working.html
---------This will help.Thanks.

Feb 12, 2012 | 2002 Ford Focus

1 Answer

The turn signals on my 04 eclipse spyder Stopped!


There is a relay for your turn signals at the fuse block in the engine compartment,the wipers are on another circuit, if all the other wiper positions work,you got a bad switch

Dec 15, 2009 | 1998 Mitsubishi Eclipse

1 Answer

Turn signal lights stop working. Neither the right or left turn signal work. Heard a noise before it stop working. The flashing started slowing down and stop blinking. Now it doesn't work at all. What


most likely its the turn signal relay. which is under the hood. in the fuse box. also make sure ur running lights are working if they are connected to the turn signal.

May 08, 2009 | 1993 Nissan Pathfinder

1 Answer

1999 Nissan Altima GXE Turn signal problem


you have a busted bulb, your hazard may be working fine but the bulb is double contact so one part is working and the other is not. just check which bulb is busted.

Apr 20, 2009 | 1999 Nissan Altima

3 Answers

Turn signals


replaced turn signal flashers and muti switch turn signal still won't work Why?

Nov 08, 2008 | 2000 Jeep Grand Cherokee

1 Answer

Turn signal


Now replace the flasher unit! Frankster016

Oct 25, 2008 | 2002 Nissan Xterra

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