answersLogoWhite
Dodge Ram
Chevy Blazer S-10
Turn Signals and Hazard Lights

Why would the turn signal flasher unit stay hot?


Top Answer
User Avatar
Wiki User
Answered 2011-09-13 17:24:51
Overheating flasher/relayThe generic answer is "it depends" . Without more specific info on the flasher (IE make, model, and year vehicle it is fitted to, and/or type of flasher IE thermal/mechanical or electronic/solidstate)all I can offer is general "blackbox" diagnosis techniques. That is a method of examining the inputs and outputs of a device to determine if it is functioning properly without regard to what is inside "the box".

Please verify that the CORRECT flasher/relay for the vehicle in question is in fact fitted. The wrong one could cause what you are describing with nothing else actually wrong. Substitute a known good flasher/relay of the correct type for the overheating one and see if the problem goes away. If the flasher/relay is At Fault there will be no further sign of the problem, but if it does not then vehicle electrical system is causing the problem.

Unplug and/or substitute a known good hazard switch for the one in the vehicle (the turnsignal power lines usually go thru the hazzard switch) and see if the overheat stops.

Does the vehicle have a tow package electrical adapter (like U-haul) installed? These contain diodes inside that can short and cause low level load related problems.

Check the ground connections between the battery and vehicle body. Do this with a voltmeter, there should be less than 0.10v voltage drop across any ground (one probe on the battery post and the other on the body where the cable attaches) with a load on the cable (meaning with power flowing thru it). I have seen a bad ground cause a power feedback thru unexpected pathways as the electicity tries to get back to the (badly grounded) battery post using the engine block ground cable.

With the preceeding in mind...

Do the turnsignals have to be used befor it heats up or will it heat up just from turning on the key? Do the turn signals/parking lights ALL work properly? By that I mean do they come on only when they should, and go off only when they should? If some lights are coming on when they should not, and any bulbs were recently replaced, check to make sure the correct replacement bulb was fitted. I have seen unusual operation when a single filament bulb was fitted to a dual filament socket (yes, it will fit, and the single filament bulb-contact bridges the dual filament contacts in the socket creating a "short" between turnsignal and tail light circuits).

Finally, with the electrical system in the problem mode (IE turned on, etc as needed to create the overheat condition) but the turnsignals (and hazard switch) turned off, disconnect or pull the flasher/relay out of it's socket and watch for the flash of a spark. You may need to use a darkened environment such as a garage with the door down or outside at night to see the flash. If you DO see a flash from a spark then there is a definite load on the flasher/relay when there should not be. Try to see if any lights or other loads go out when the relay/flasher is unplugged and if you do see something change that may be the issue or related to the issue at cause.

Good luck.

001
๐Ÿ™
0
๐Ÿคจ
0
๐Ÿ˜ฎ
0
๐Ÿ˜‚
0
User Avatar

Your Answer

Loading...

Still Have Questions?

Related Questions

Why would the left and right turn signal lights stay lit?

Bad turn signal flasher.


Why does your right rear flasher stay on 1999 jeep grand Cherokee?

check and make sure all the lights are on like if a turn signal is out in the front then the signal will stay on in the back when you turn the turn signal on.


Where is the turn signal flasher on a 2002 Impala?

Where is the turn signal flasher on a 2002 impala


What fuse relay controls the turn signals on a 1995 Jeep Cherokee 4.0 liter?

Turn signal flasher, fuse and/or switch Turn signal flasher, fuse and/or switch Turn signal flasher, fuse and/or switch Turn signal flasher, fuse and/or switch


Where is turn signal flasher in 1999 Dodge Caravan?

The body computer is the turn signal flasher.


Where is the turn signal flasher located on an 2004 Alero?

the emergecy flasher swith is the turn signal flasher. this is a dealer part and is changed easily the emergecy flasher swith is the turn signal flasher. this is a dealer part and is changed easily


Why would your turn signals not work?

Check/replace turn signal flasher


Where is the turn signal flasher on a 1996 lumina sedan?

where is the turn signal flasher on a 1996 lumina sedan


Where is the turn signal flasher located on a 2008 Chevy Cobalt?

turn signal flasher for inside indicater


Where is the turn signal flasher on a 2008 Ford Edge?

where is the turn signal flasher on 2008 ford ranger


What would cause turn signal flasher to keep clicking even if no turn signal is not turned on. on a 99 gmc jimmy?

The cause for a turn signal flasher to keep clicking on a 1999 GMC Jimmy is a bad flasher unit. Replacing this with a new flasher unit should solve this problem.


Where exactly is the turn signal flasher unit located in your Suzuki Sidekick?

I was told TODAY that the emergency flasher is the same as the turn signal flasher.


Where is the turn signal flasher on a 2001 Chevy Impala?

The turn signal flasher is integrated with the 4 way flasher switch located on the dash.


Is left turn signal flasher separate from flasher relay for right turn signal?

Same flasher for left and right signals but a different flasher for the emergency flashers.


Where is the turn signal flasher located in a 2002 Nissan frontier?

where is turn signal flasher 2002 nissan frontier


Why would your turn signal light up but not flash on a Jeep Cherokee?

Check bulbs Replace turn signal flasher


Where is turn signal flasher on 1987 corvette?

The 1987 Chevrolet Corvette turn signal flasher switch is located beneath the drivers side dashboard. The turn signal flasher switch will be to the right of the brake pedal.


Where is turn signal flasher on 2001 Hyundai accent?

The turn signal flasher relay switch can be found beneath the drivers side dashboard. The turn signal flasher relay switch will be to the left of the brake pedal.


Where is the turn signal flasher located on a 1971 vw van?

I believe the hazard switch is used as the turn signal flasher in 71 bus. No extra flasher involved... I believe the hazard switch is used as the turn signal flasher in 71 bus. No extra flasher involved...


Where is the turn signal flasher located on 2004 Chevy ventura van?

Where is the turn signal flasher on a 2004 ventra van


What makes turn signal on a 1983 regal stop or make the flasher come on when turning turn signal on?

Flasher relay.


Where is the turn signal flasher located on Dodge Ram?

Both the hazard flasher unit and the turn signal flasher unit are in the main fuse box and are identified


What is the fix for non working turn signals on a 1993 Cougar when the hazard flasher and all associated bulbs work?

the fix is to replace turn signal flasher the hazard flasher is separate from the turn signal flasher


1996 Dodge Ram 1500 turn signal flasher relay location?

Turn Signal flasher is located in the fuse box on the left side of the dash. There should be two round flasher units. The top one is the four way flasher and below is the turn signal flasher.


Where is the turn signal flasher located for 1995 corvette?

The 1995 Chevrolet Corvette turn signal flasher unit is located behind the drivers side dashboard. The turn signal flasher unit will be above the brake pedal.