Question about Mitsubishi Endeavor
UCU that controls head lights goes out with in 100-500 miles after replacement. 8 have been installed so far anbd needs new one now. No high beam when it =goes out and low beam lights are 50% of normal. What will cause this?
When lights go dull it means either a bad earth / high resistance to current flow or the current for the lights is being diverted before it gets to the lights . What I mean is that there would be 12 volts at the power wire to the lights and very low voltage at the earth wire from the lights as the resistance of the bulb elements reduce the current flow . Now if there is a place that is draining off the 12 volts before it gets to the bulbs say to 7 volts then there is less current available to properly work the lights and they will be dull. A bad earth will effectively add extra lights into the circuit and increase the current flow as it is like hooking lights up in series(P ve to N-ve to pve to neg to pso to nev and so on instaed of adding lights in parallel ( all pve on one terminal and all Nve on the other . If you keep having troubles with the unit burning out then check the earth points and if you are running extra lights or lights with higher current draw ( example 65 watt bulbs to 125 watt bulbs ) with out running a relay in the circuit will cause problems as the unit is not designed for that sort of current draw.. The units will be good to start with but the killer will be too high a current draw through it from some of the faults I have outlined . BY using a multimeter and an amp meter in the circuits you may find the faulty bit
Posted on Mar 21, 2014
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Posted on Jan 02, 2017
with my 2003 gmc when you open the hood and look at the top of the head light assembly you see two rods that kinda look like the end of an allen wrench (hard to explain in words) you have to turn them a quarter turn to unlock them and then pull them straight up and out. they are pins that hold the headlight assembly into the truck. when you remove them the whole assembly will then come out forward and you can change the bulb. the hard part if aligning the holes and getting the pins back in. dont forget to turn the pins back into the locked position after. hope this helps as my truck is a little older.
Posted on Jan 18, 2009
sounds like the problem is the dimmer switch, get a price on the dimmer switch. If you have to, get one at a junk yard . It's cheaper.
Posted on Dec 31, 2009
Open hood, look on top of head light assm, you will see a bolt or screw, these hold assm in. remove, and pull out assm. Turn lock collar, remove old bulb, install new, BUT DO NOT TOUCH GLASS END OF BULB WITH YOU HAND, the oil from your skin will make the bulb explode when it is heated.
Posted on Feb 04, 2010
You only install a new fuse, if the old one blows
Why is it that, something, no one understands
A fuse does not make for a repair,it protects a cuircuit, from a current overload,if you got any headlights,you can forget even checking the fuses. (common sense)
If you got hi beams on both lights,why would you think,both low beams went.
Check out something common,hi/low beam selector switch,may be something else,but surely a good place to start
Unplug one head light and use a volt meter.
Without the ability to understand basic electricity, and use a meter,you may as well leave the hood closed
Posted on Nov 08, 2010
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