Question about 2005 Pontiac Montana SV6

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How can I test the multifunction switch?

The center brake light works. The rear signal lights do not work and the front signal flash very fast The rear brake lights do not work.

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  • 104 Answers

Its possible both brake bulbs are burnt out.
Rare, but a wiring issue to both rears.
try the hazards. if the hazards are same as brake lights you are in luck to test alot. if the brake lamps light up with hazards then you know your multi function switchis bad.

Posted on Jun 14, 2014

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Posted on Jan 02, 2017

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SOURCE: brake lights not working

check brake light switch

Posted on Sep 13, 2008

wracefans24
  • 1985 Answers

SOURCE: 2002 Sunfire SE: rear signal light

Turn the signal light on to the right and probe the contacts in the bulb socket with a test light to see if the power is there,your test light should blink,the other contact in the socket is the parking lights and tail light.
if no power at contacts probe the wire it's self where it enters the socket for power.if you have it there the socket is faulty.

Posted on Nov 24, 2009

Testimonial: "Thanks that was what it was! I need a new socket."

  • 5 Answers

SOURCE: The right front signal light is flashing fast.

The fast flashing normaly means that there is A light out it does not mean it is that one, It can be front or back. This video should help with the install. http://www.youtube.com/watch?v=4ewEB890UFo

Posted on Jan 20, 2010

jsmes1027
  • 749 Answers

SOURCE: driver front turn signal does not blink. front

This may have more then one bulb in the front or possibly a bad socket try wiggling the new bulb in the socket to see if it will work.Compare all turn signal lights that come on the passenger side to those drivers side.Some vehicles also incorporate sidemarker lights with the turn signals.

Posted on May 29, 2010

  • 57 Answers

SOURCE: 2004 Pontiac Grand Prix GTP front pass turn signal doesn't work

you would need to buy a blinker relay

Posted on Jul 11, 2010

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2011 Chevy Silvarado 1500 LS turn signal lights on the front passenger side don't work and rear goes fast...


Circuit/System Description
Ground is applied at all times at G201 to the turn signal/multifunction switch. The turn signal lamps may only be activated with the ignition switch in the ON or START position. When the turn signal/multifunction switch is placed in either the TURN RIGHT or TURN LEFT position, ground is applied to the body control module (BCM) through either the right turn or left turn signal switch signal circuit. The BCM then applies a pulsating voltage to the front and rear turn signal lamps through their respective control circuits.
.
Did you check the RT STOP TRN fuse 15amp insturment panel fuse box.
Fuse Block - I/P
Left of the I/P behind the side trim panel
If the fuse is good , you could have a wiring problem or the BCM is bad .

Sep 08, 2017 | Cars & Trucks

1 Answer

All my lights work on my 2005 ford focus except the lower brake lights and turn signals. all fuses are good.


Do you know anything about automotive electronics ?
Stoplamps
The stoplamps are part of the rear lamp assembly. When the brake pedal is applied, the stoplamp switch supplies voltage to the generic electronic module (GEM) and the high mounted stoplamp. The GEM then supplies voltage to the rear lamps.

Turn Signal Lamps and Hazard Warning Lamps
The turn signal lamps and hazard warning lamps system consists of:
  • Hazard switch
  • Multifunction switch
  • GEM
  • Turn signal lamps
When the multifunction switch is placed in the LH or RH turn positions, a voltage signal from the GEM is routed to ground. When the GEM detects the multifunction switch in the LH or RH turn position, the GEM supplies voltage to the appropriate turn lamps in a flashing manner. When operating correctly, the turn lamps flash approximately 80 times per minute.
When the hazard warning switch (located in the upper part of the center console) is switched on, a voltage signal from the GEM is routed to ground. When the GEM detects that the hazard switch is switched on, the GEM supplies voltage to all the turn signal lamps in a flashing manner. When operating correctly, the hazard lamps flash approximately 80 times per minute.

Do you know how to test electrical circuits with a DVOM - digital volt ohm meter , how to read an use a wiring diagram to pin point locations in a electrical circuit for testing B+ voltage an ground ?

Free wiring diagrams
http://www.bbbind.com/free_tsb.html Enter your vehicle info . year ,make , model an engine size . Under system click on lighting ,then under subsystem click on turn signal lamps . Click the search button then each blue link , one at a time .


Electric Testing Techniques You Need to Know
Basic Electricity for Service Techs Ohm law Current Flow Opens Shorts

May 07, 2017 | Ford Cars & Trucks

1 Answer

No Tail lights. Or brake lights(when the headlights are on). HELP!!!


I think you have a bad ground at the back on both rear lights or their earth out on the same connection but these american cars use a funny system where the stop lights are the indicators and not a seperate yellow light like europeon motors ,Now these brake light switches also allow the indicators to work by shutting off the feed to the stop light so it flashes with indicators ,Why american cars use this system i dont know as its so complicated for the stop light switch function but try the ground or earth wire on the back lights and if no joy then ask a american mechanic with experiance of this sort of circuitry as when i get american cars for import i have to fit new back lights and disconnect the brake light switch .

Feb 17, 2012 | Cars & Trucks

2 Answers

I have a 94 Chevy C1500 and the right side brake light and blinker are not working. The tail light and reverse light work though, and the right front blinker works but it blinks twice as fast as it...


It could be a bad multifunction (turn signal) switch. The way that switch works, it is possible that it can turn on the front blinker and not the rear one. It also cancels the brake circuit so the turn signal can work with the brake pedal depressed.

However, a more likely cause would be a break in the YELLOW/BROWN wire at the rear of the truck. It is common for the connector to get corroded at the left rear frame area where the bed harness connects to the vehicle harness. If you have trailer connections spliced into the wiring harness, these connections are also prime candidates for corrosion. I would look there first. Inspect these harnesses thoroughly all the way up and into the tail light assembly.

If the wires under the back of the truck look good, then I would check for power coming out of the turn signal switch. The wire at the turn signal switch is plain YELLOW (with no brown tracer). It is Pin (M) on the turn signal switch connector. The front signal is a LIGHT BLUE wire at the turn signal switch Pin (H). If you probe these with a test lamp, they should both work the same except the yellow wire will be hot with the brake pedal depressed and the switch NOT in the left turn position. If there is no power at the switch connector, replace the switch.

May 13, 2011 | 1994 Chevrolet K1500

1 Answer

Left front turn signal does not flash. Left rear OK. socket was corroded so I replaced socket. No flash. Checked wires for voltage, only the parking light connection ever gets anything. Front and rear...


Try pushing the Hazard switch on the Column several times and see if it restores the connection. From what I understand about the Multifunction Turn switch is that some of the contacts share connections with the Hazard Button.

The contacts work on a type of derailer setup and when the contacts get dirty or wear, things stop working. Moving the Hazard switch resets the points and springs each time you go in and out of the Hazard setting.

If your brake light is working you know the wires to the light socket from the brake switch are okay. Probably would not hurt to check brake light switch as it shares the common wire. The split between the left turn and right turn signal wire has to occur, yet the opposite brake light will stay on steady while the other side blinks.

Oct 22, 2010 | Ford E-250 Cars & Trucks

1 Answer

Left and right rear brake lights are out. center brake light comes on. rear blinkers are out too. front blinkers blink fast like a blown bulb but they arent blown. fuses are good.


it sounds like you need to replace the turn signal switch ( also known as a multifunction switch). The brake lights also go through that switch; You will have to remove the cover from around the lower part of the steering column to gain access to the switch.Hope this helps. Please leave comment.

Mar 26, 2010 | 1997 Chevrolet Cavalier

1 Answer

The rear passenger turn signal/brake does not work.front turn signal and marker light flash.turn signal on dash flashes fast.have replaced and checked rear bulbs.think it may be a broken wire but not sure...


Check between connections, starting from back of lights. Turn hazards on and use a safety pin to poke through wire and test with test light, be sure to tape over hole.

Jan 06, 2010 | 1999 Chevrolet Suburban

1 Answer

98 chev 2500 no brake lights on box works on center of cab no turn signals on box. blinking fast on front but working hazards work on front not on rear if u apply breaks with hazards they stop working


Possible cause is the connector is disconnected and the bumper area. Main ground wire may be loose, check manual for ground location. Also the wiring loom may have been damaged between the rear lights and the front connector. The front lights will blink fast when the rear lights do not work. There could also be a problem with the turn signal switch. Check with the wiring schematics to see which wires to check for power.

DT

Sep 25, 2009 | 1998 Chevrolet C2500

2 Answers

Rear turn signals don't work, bulbs are good, front signals blink fast, at first only drivers side didn't work occasionally, now neither side works at all. What's wrong?


are you sure bulbs are good ?? double check bulbs also make sure there is a ground wire from your light fixture is grounded to the body near by this might be causing your problem .. usually if front ones blink fast rear bulbs are bad ... thanks Jerry holler if you need more.

Jan 29, 2009 | 2004 Pontiac Grand Prix

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