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No power to ignition switch - Cars & Trucks

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Without knowing the car, the best place to start is at the fuse box. Identify the fuse that feeds the switch. Assuming it's good, check power to the fuse. If it's bad there, check for a fusible link between the battery and fuse box. If you have power to the fuse and the fuse is good, start checking your wires. If the fuse was blown, replace it. If it blows again, you likely have a short that could be anywhere up to the switch and anything fed by the switch.

Posted on Apr 26, 2015

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Posted on Jan 02, 2017

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2006 grand am starts by its self won't shut off


What after market products do you have , if any ? Have you done any electrical repairs ? Could be a ignition switch problem , GM has had switch problems for sure . The starting of your vehicle is computer controlled by the BCM - body control module . The ignition switch could be sending a wrong input to the BCM ,causing it to start .Power to many of this vehicle's circuits are controlled by the module that is designated the power mode master (PMM). This vehicle PMM is the body control module (BCM). The PMM controls which power mode (Run, Accessory, Crank, Retained Accessory Power, or Off) is active.
Serial Data Power Mode
On vehicles that have several control modules connected by serial data circuits, one module is the power mode master (PMM). On this vehicle, the PMM is the body control module (BCM). The PMM receives 3 discrete ignition switch signals to differentiate which power mode will be sent over the Serial Data circuits. The table below illustrates the state of these inputs in correspondence to the ignition switch position: If this came to the dealer I work at the first thing I would check is the ignition switch inputs to the BCM . I would use Tech 2 , GM factory scan tool .

Relay Controlled Power Mode
The body control module (BCM) uses the discrete ignition switch inputs ignition 1, ignition 3 and crank to distinguish the correct power mode. Once the BCM has determined the power mode selected by the vehicle operator it will energize the Ignition relay, Run relay and retained accessory power (RAP) relay, depending on which power mode is selected.

good luck !

Feb 13, 2017 | 2006 Pontiac Grand Am

1 Answer

I'm working on a 97 geo prizm and need to find the ignition relay,I rplaced the ignition switch and have no power getting to the switch,there is power at the harness and I can bypass the switch an


If you can jump it at the switch and get it to start, then the ignition relay must be working. It is hard to tell from your post but I think you are using power from another source to do this? I am thinking you have a blown fuse on the wire the furnishes power to you ignition switch.

Feb 12, 2012 | 1997 Geo Prizm

1 Answer

Car runs but no heat no power windows and the abs light is on any ideas?


A bad ignition switch can cause this. Check for power at fuses F21 (20 Amp), F20 (10 Amp), F23 (10 Amp), and circuit breaker C1 (25 Amp) in the junction block with the ignition switch in the ON position. If these fuses and circuit breaker do not have any power with the ignition switch on, then the ignition switch is most likely defective. If this is the case, there also may be damage to the BLACK/ORANGE wire coming out f the ignition switch. Check this over for heat damage. You may have to replace the ignition switch connector.

Apr 24, 2011 | 1994 Chrysler Concorde

1 Answer

Radio wires what colors are what?


Below is the layout you requested:

PART COLOR LOCATION 12 VOLT CONSTANT RED (+) IGNITION SWITCH HARNESS STARTER YELLOW (+) IGNITION SWITCH HARNESS STARTER 2 N/A IGNITION 1 PINK (+) IGNITION SWITCH HARNESS IGNITION 2 N/A IGNITION SWITCH HARNESS IGNITION 3 N/A ACCESSORY/HEATER BLOWER 1 ORANGE (+) IGNITION SWITCH HARNESS ACCESSORY/HEATER BLOWER 2 N/A KEYSENSE N/A PARKING LIGHTS ( - ) LIGHT BLUE (-) @ HEADLIGHT SWITCH PARKING LIGHTS ( + ) PURPLE (+) or BROWN/WHITE (+) @ FUSE BOX POWER LOCK WHITE (TYPE B) @ BACK of FUSEBOX, ETACS, See NOTE *1 POWER UNLOCK LIGHT BLUE (TYPE B) @ BACK of FUSEBOX, ETACS, See NOTE *1 DOOR TRIGGER YELLOW (-) IN DRIVERS KICK PANEL or ETACS, See NOTE *1 DOMELIGHT SUPERVISION USE DOOR TRIGGER, Requires Part #775 Relay TRUNK RELEASE BLUE (+), Requires Part #775 Relay IN DRIVERS KICK PANEL SLIDING POWER DOOR N/A HORN YELLOW (-) @ STEERING COLUMN HARNESS TACH WHITE (-) @ ECM, See NOTE *2 WAIT TO START LIGHT N/A BRAKE LIGHT BLUE (+) @ SWITCH ABOVE BRAKE PEDAL

Mar 24, 2011 | 2002 Kia Optima

1 Answer

What are the schematics for wirinig an ignition for a 1991 300e mercedes benz? I am not sure what wire goes where when wiring my ignition


  1. The following fuses can cause the car not to start. Check and Replace fuses B, 5 and 6 and 7.
  2. Check the power to the neutral safety switch. When the ignition switch is activated there is no power to the neutral safety switch. Power to the neutral safety switch comes from the ignition switch on the violet wire. If there is no power at the violet wire when the key turns to start, the ignition switch is probably bad or there is a problem with the wiring to the switch.
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Feb 17, 2011 | 1991 Mercedes-Benz 300 Diesel

1 Answer

92 mercury topaz small 4 cyl. I hooked up jumper cables and engine started cranking, no key in ignition. I had installed a new starter, battery and solenoid relay on the fender well 2 months prior. About 2...


It sounds like the ignition switch again, thats the only source for the starter solenoid to power up. I'd disconnect the power to the starter solenoid (ignintion input small wires, not the battery cables). Jumper the battery again, check for power on the solenoid for the ignition feed, if it has power then yes the ignition switch is bypassed somehow. I've seen issues with the back side of the connector going to the ignition switch where the wires are bare from being flexed, the insulation breaks and wires touch each other. Carefully check the condition of the wires going to the ignition switch, if good replace ignition switch again.

Jan 31, 2011 | 1992 Mercury Topaz

1 Answer

Need a wiring diagram that will assist in installing a remote car starter for a 2003 4x4 kia sorento


12 VOLT CONSTANT GREEN (+) and BLUE (+) IGNITION SWITCH HARNESS STARTER RED (+) IGNITION SWITCH HARNESS STARTER 2 N/A IGNITION 1 YELLOW (+) IGNITION SWITCH HARNESS IGNITION 2 N/A IGNITION 3 N/A ACCESSORY/HEATER BLOWER 1 ORANGE (+) IGNITION SWITCH HARNESS ACCESSORY/HEATER BLOWER 2 WHITE (+) IGNITION SWITCH HARNESS KEYSENSE N/A PARKING LIGHTS ( - ) WHITE (-) @ HEADLIGHT SWITCH PARKING LIGHTS ( + ) RED/BLACK (+) @ DIMMER SWITCH POWER LOCK BLUE (TYPE B) IN DRIVERS KICK PANEL, at DOOR HARNESS POWER UNLOCK WHITE (TYPE B) IN DRIVERS KICK PANEL, at DOOR HARNESS LOCK MOTOR WIRE WHITE (+) IN DRIVERS KICK, at DOOR HARNESS DOOR TRIGGER RED/BLACK (-) DRIVER KICK PANEL HIGH IN BLUE PLUG DOMELIGHT SUPERVISION USE DOOR TRIGGER, Requires Part #775 Relay TRUNK RELEASE RED/ORANGE ( - ), Requires Part #775 Relay IN DRIVERS KICK PANEL, harness to rear of vehicle SLIDING POWER DOOR N/A HORN BLUE/BLACK ( - ) @ STEERING COLUMN HARNESS TACH RED (-) @ COIL PACK WAIT TO START LIGHT N/A BRAKE WHITE ( + ) @ SWITCH ABOVE BRAKE PEDAL FACTORY ALARM DISARM ORANGE (-) IN DRIVERS KICK PANEL

Dec 21, 2009 | 2003 Kia Sorento

1 Answer

Is there a inline fuse from the ignition switch to the ignition coil?


no sir
not from the switch to the coil.
the coil does not get power from the switch.
the switch turns relays on that powers the coils.
but there is an ignition fuse.
the ignition switch turns on power relays from the battery that powers the ignition system.
the ignition system fuse is in the fuse box.

hope this helps
thank you
jm

Jul 29, 2009 | 1995 Ford Explorer

2 Answers

1996 ignition switch-what wires to check power on


ignition switch may be worn or a loose exciter wire [to starter] thats the small terminal on starter motor you can bridge it to the posative [power] on the starter it should start!
if it does start just work back from there to ignition look for broken or loosse connection
if that all is ok it will need ignition switch

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2 Answers

Chevrolet Astro -89 electrical diagram


nowhere, you have to buy one for 8.00

Jan 14, 2009 | 1989 Chevrolet Astro Cargo

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