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I have no power at key switch but have head lights

I turn the key and have no power but have head lights

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Posted on Nov 27, 2013

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Motor don't turn nothing dash lights and head lights 1985toyota pu


Do the gauges and warning lights work with key on? If not, check fusible links, AM1 for ignition key power. If the gauges/warning lights work, the key switch has power, so you can follow it to the starter solenoid. The start wire out of the ignition switch is a black/white wire, this is the hot wire to the solenoid, and only has power when key is held in start. With automatics, there is only one switch-a neutral start switch- between the ignition switch and the solenoid on the starter .

With a manual transmission, the black-white start wire goes to both a starter relay and a clutch start switch (on the clutch pedal), those two work together to send the power on to the starter solenoid. So, no crank, good battery, power to key, follow the black/white wire, the start relay and the clutch switch, to the starter solenoid- a hot wire there turns the starter motor on.

Mar 17, 2015 | Cars & Trucks

1 Answer

After i turn off the head light switch my head lights stay on


I suspect an open circuit on the powered side grounding therefore keeping on the lights or a bad headlamp switch they have been known to fail hope this helps u

Mar 03, 2014 | Oldsmobile Bravada Cars & Trucks

1 Answer

I have full battery power but no power to my dash ignition lights when i turn key put have head lights and horn. on my 2008 chevy cobalt


Some cars have inline fuses in the battery cables and have multiple connections for components making one get power and others not. If all your fuses are good, the next thing to look at is the electrical part of the key switch. Usually there is the mechanical part with the tumbler, and the electrical part.

Dec 07, 2013 | 2008 Chevrolet Malibu

2 Answers

I have a 92 sentra lights come on but when i turn key nothing happens. Starter good ,relay good, head lights don't dim when you turn key . Car won't turn over at all


If by lights, you mean the dash lights come on, then ignition switch must be getting power. If dash is not working with key on, check the 30 amp fuse link which powers the ignition switch.
If switch is good and starter is good, the start wire from switch goes to, if automatic, to inhibitor relay (the park/neutral function) and then to starter. There is also an inhibitor switch on the shifter or on the transaxle that turns on the inhibitor relay when key is on and shifter in park or neutral. The inhibitor switch is powered by a 10 amp fuse D.
If you have a manual transmission, the start wire from ignition switch goes to the clutch interlock relay and then to the starter. This relay is turned on by the clutch interlock switch on the clutch pedal.
You can check for power on either relay, the inhibitor relay or the clutch interlock relay, with a test light. Pull the relay out, have the key held in start position. Now both relays would have power showing on two terminals where the relay plugs in. If inhibitor relay only has power on one terminal or no power at all, either ignition switch is not sending power or fuse D is out or the inhibitor switch is not working right. If clutch interlock switch does not have power on two terminals either the ignition switch is not sending power or the clutch interlock switch is bad.
If the relay checks are good, check for power on the small wire to starter with key held in start. If you have power there, the starter solenoid must be out.

May 08, 2013 | Cars & Trucks

1 Answer

Lights, radio and powerdoor locks work, turn key to start car nothing happens


If you had said the radio did not work, I would say it was the key switch or a large fuse or fuseable link.
But the radio is powered thru the key switch.
The problem could still be the key switch or a major fuse, I would check all of the fuses then power at the key switch.
Also check the ground connections.

Jul 18, 2012 | 2003 Oldsmobile Alero

1 Answer

After turning of the igition switch and removing the keys the head lights and rear lights stays on.


Head lights and rear lights run on a separate power line than the ignition switch. Those are on a manual switch always allowed power wiring.

Sep 03, 2010 | 1996 Dodge Caravan

1 Answer

I have no dash or running lights and fuse box under hood and under the dash all check out good.


The head light switch controls all this,on this model.The head light switch has gone out.If you will check,on the fuses,marked instrument lps,the fuse will not have power going to it,when you turn on the head lights.To make them work,run a wire from a hot fuse,that is only hot with the key on.You will have parking lights,and dash lights when ever you turn the ignition on.The headlight switch will not control the running lights,or the dash lighting any longer,after you do this.But replacement of the headlight switch will fix the problem correctly.If this has been at all helpful,please let us know,thank you.

Oct 25, 2009 | 1993 Plymouth Colt

1 Answer

Night driving head lights not turning on.


yes it could be a bulb. If you have any power going to the light then its not the fuse. the next place to look is the light switch. and the mounting bracket that the light switch plugs into. If its a newer car, then just the switch. So replace your bulb and see how it goes.

Feb 03, 2009 | 2002 Toyota Tundra

1 Answer

98 silverado:brake light on with key on goes off when park or head lights on


Check the ground wires at the rear and at the head lights on both sides. Frankster016

Oct 20, 2008 | 1998 Chevrolet K1500

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