Question about 2005 Hyundai Terracan 2.9

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Hi Im trying to wire a set of spoties into the high beem circuit through a switch in the cabin but it seems to have a neg switch system can you supply a dia to help me . 06 Terracan Highlander Cheers Ernie

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You need to tap into the high beam RELAY power. The computer uses a signal to switch on the lights, it sees a signal and tells the relay to come on using a lower voltage or even as you suggested a ground, when the relay closes it sends voltage to the lights.

Posted on Oct 20, 2013

Testimonial: "Thanks Mike I found a feed at the lights to the coil through a switch inside the cab then to ground, I don't know why I could not figure it out, must have been having a seniors moment. Cheers Ernie"

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I want to take out the high beem fuse for a 2003 buick regal... I lost the car manual


Two fuses HDLP L fuse #36 15amp & HDLP R fuse #32 15amp ,located in the under hood fuse / relay box. One is for Left - low an high beams an the other is for right side low an high beams . What's wrong , no high beams ?
Headlamps Inoperative - High Beams

1

Did you perform the Lighting System Diagnostic System Check?
Go to Step 2
Go to Diagnostic System Check - Lighting Systems

2

  1. Turn the ignition to the OFF position.
  2. Turn the headlamp switch to the HEAD position.
  3. Place the headlamp dimmer switch in the high beam position.
Are the high beam headlamps operating properly?
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
yes Go to Step 3


Is only one high beam headlamp inoperative?
yes Go to Step 7
Go to Step 4

4

Place the headlamp dimmer switch in the flash to pass position.
Do the high beam headlamps operate in the flash to pass position?
Go to Step 13 yes
Go to Step 5 no

5

Place the headlamp dimmer switch in the high beam position.
Does the high beam indicator illuminate?
Go to Step 12
Go to Step 6

6

Test for a high resistance, an open or a short to battery positive voltage in the high beam signal circuit of the headlamp dimmer switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 17
Go to Step 13

7

  1. Disconnect the inoperative headlamp.
  2. Using a test lamp connected to ground, probe the battery positive voltage circuit of the inoperative high beam headlamp.
Does the test lamp illuminate?
Go to Step 8
Go to Step 9

8

Connect a test lamp between the headlamp high beam signal circuit and the battery positive voltage circuit of the inoperative high beam headlamp.
Does the test lamp illuminate?
Go to Step 11
Go to Step 10

9

Test for a high resistance or an open in the battery positive voltage circuit of the inoperative headlamp. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 17
Go to Step 12

10

Test for a high resistance or an open in the headlamp high beam signal circuit of the inoperative high beam headlamp. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 17
Go to Step 12

11

Inspect for poor connections at the harness connector of the inoperative headlamp. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 17
Go to Step 14

12

Inspect for poor connections at the harness connector of the fuse block - underhood. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 17
Go to Step 15

13

Inspect for poor connections at the harness connector of the headlamp dimmer switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 17
Go to Step 16

14

Replace the inoperative headlamp. Refer to Headlamp Assembly or Headlamp Bulb and/or Cornering, Sidemarker, Park, Turn Signal Bulb Replacement .
Did you complete the repair?
Go to Step 17
--

15

Replace the fuse block - underhood. Refer to Underhood Electrical Center or Junction Block Replacement in Wiring Systems.
Did you complete the repair?
Go to Step 17
--

16

Replace the headlamp dimmer switch. Refer to Turn Signal Multifunction Switch Replacement in Steering Wheel and Column.
Did you complete the repair?
Go to Step 17
--

17

Operate the system in order to verify the repair.
Did you correct the condition?
System OK
Go to Step 2

Jan 07, 2016 | Buick Cars & Trucks

1 Answer

Hi...the cab lights or high beams won't work on my 2007 freightliner columbia semi. How do I know if it's a short or a ground wire problem? If anyone can help me I would appreciate it so...


headlights on freight liners are set in fiberglass bonnets so the system needs return earth wires . Check for insulation failure at the bonnet hinges where the wiring loom comes back into the truck proper. If high beams are not working then neither will low beams if it is a wiring /earth problem. Having checked that out -check high beam relay and fuse for correct operation Check all the fuses for the cabin lights. Check that the cabin light switch is on ( does the cabin light come on when the door is opened)--blown bulbs)
Use a multimeter check for voltage at the light switch in and out to check light switch. Appreciating that you have to keep the wheels rolling it may be best to take it to a truck electrician as most trucks have common faults due to the manufacture and lay out of the wiring systems.

Nov 13, 2014 | Cars & Trucks

1 Answer

The headlight on the pass. side works right. the drivers side when in low beem, the light is in high beem. when the light is on high beem the light is on low beem. this is a 2000 mercury sable


someone has switched the wiring harness sockets to the wrong bulbs or installed the bulbs in reverse. get in behind the headlight assembly on the driver side and reverse the wires, if that does not work then pull the bulbs and swap them inside to outside and vice versa.

Jun 10, 2011 | Mercury Sable Cars & Trucks

1 Answer

1998 Camry Low beams work fine but when i switch to high beam i loose all lights


the relay for your highbeem lights is bad, replace it and you should be good, or you could just switch the high beem relay, with the low beem relay, they are the same, and if the high beems work like that you know its full proof, if not... well you know, we will hafta move to something else.. hope you find this helpful

Dec 04, 2010 | 1998 Toyota Camry

1 Answer

I have a 1997 F-350 with a 7.3 and lately while I am driving my headlights only turn off and some times I can push the switch in one click and then pull it back out and the lights come back on, other times...


Sounds like the contacts in your switch are going bad. The switch in your high-low beam lever is extremely hard to get to as the steering column will need to come out, if it's the style I recall on a 97. The switch you may be able to find on the web somewhere because if you get it from ford it may be pricey. You will probably need to take it to your local service center to be replaced.

Nov 17, 2010 | Ford F-350 Cars & Trucks

1 Answer

Head light do not work but the high beams will


This is a common problem. You didn't mention the type of vehicle you have and whether or not its one or both bulbs. At any rate, first make sure the bulbs are not blown, the head light fuses are not blow and that the headlight connectors are on. If all of those things are good there maybe a problem with the wires or the dimmer switch may have failed. You may need a wiring diagram to follow up with. I know that you will say that because the switch still activates the high beems, how could it have failed. The reason is because power for the low beams often travel thru this switch. Often times, this portion of the circuit can fail.

Apr 20, 2010 | 1999 Ford Windstar

3 Answers

Low Beems are out. I changed both bulbs and the


DIMMER SWITCH OUT OF ADJUSTMENT.I SEEN CAR WITH SAME PROBLEM THEIR HIGH BEAMS WOULDNT WORK.THE DIMMER SWITCH AND BULBS WAS GOOD.IT TURNED OUT TO BE DIMMER SWITCH NEED TO ADJUSTED.

Mar 21, 2010 | 2005 Chevrolet Monte Carlo

1 Answer

1998 Explorer no turn signals or flashers.


The Flasher Relay is bad, replace it. Located front seating area, driver side, behind dash, mounted on steering column. Curtorsey: Auto Zone.

Sep 14, 2009 | 1998 Ford Explorer

1 Answer

2005 Trailblazer, Low beems will not work high beems do


Pull plastic cover off of column ck where wires mate to multi function switch and switch for traces of heat . More than likely switch is bad.

Jun 16, 2009 | 2005 Chevrolet Trailblazer Ext

1 Answer

Head Lights


check the continuity of the headlights to make sure there switching from the DTR Lights to the highbeams. If you are not getting the proper continuity check the ground wire for the low beams to ensure its properly grounded and has proper continuity throughout the wire. If not replace the wire or tighten as required and that should fix your problem.


lemme know if you require further assistance,

thanks - Nate

Aug 13, 2008 | 1996 Chevrolet Cavalier

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