Multifunction Switch

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Brax98Z71

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Alright I need some help. I’ve recently bought a 98 k1500 from an older gentleman whom I work with. He is the original owner and taken care of the truck. So when I got the truck the head lights would only work in the “running lights”position and were stuck on bright. If I switched the headlight switch to the “headlights” on position then they turned off. Also the cruise control does not work. So upon further investigation and reading forums and internet research I’ve since changed the head light switch and the multi function switch. Ok, the head lights now dim when the head light switch is in the ON position like they should, but when I turn the head light switch to the off position the dims stay on. Why want the head lights turn off when I turn the switch to off, and the cruise control still doesn’t work after installation of new multi function switch. Any thing else I can check?? Sorry for the long post. Just trying to cover everything.
 

HotWheelsBurban

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The "dim" low beams may be the daytime running lights. Is there a green headlight indicator on the instrument cluster? If there is, and it goes out when the headlights are turned on, that green indicator icon is the DRL indicator.
It's not uncommon for the wiring harness inside the column and under the dashboard to get pinched or frayed, especially after 20+ years of truck usage. So you'll want to inspect all that closely for damage.
 

HotWheelsBurban

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Yes, daytime running lights are normal. My Burb has them, but the under dash module is wonky, so most of the time they aren't on. Then one day I'll start the truck and they're on, and it'll be like that for a month or so, then it'll be off again.
They were originally intended for export vehicles ( my Burb was built in Mexico) but I've seen American built vehicles that have them too.
 

someotherguy

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If they are the"inside" lights that are on, very good chance that they are the daytime running lights as HotWheelsBurban stated.
Pretty sure the Canada market trucks operate DRL's differently than US models. On US models it burns the regular low beams (outside lamps) at a slightly decreased brightness from the normal low beam function.

When the parking brake is applied, they should turn off.

The cruise control issue could easily be the brake switch, or the cruise module. The multifunction switch really isn't a big suspect in cruise failure on the 95-up models like it is on the older trucks since the design is totally different. Brake switch is pretty high failure rate as it's cheaply made. Brake lights themselves may work fine but they're on a separate set of contacts inside the switch than the cruise disable. The module can be a problem at this age because they do suffer a little bit from cracked solder joints, which one can easily DIY-repair if you are decent at all with electronics soldering.

Richard
 

Schurkey

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The Internet has "fixes" for Damned Daytime Running Lights (DDRL)

They've been disabled on all my vehicles. There's no USA Federal requirement for them; there's no peer-reviewed science that says they're effective. All the crap GM promotes for them is junk science--most of it conducted in the Baltic Socialist countries that accept government interference as a routine part of life, coupled to high latitude which means lower levels of sunlight similar to Canada/Alaska.

The National Highway Traffic Safety Administration (NHTSA) refuses to deal with DDRLs. If the NHTSA were functional, DDRLs would be illegal.
 

someotherguy

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The Internet has "fixes" for Damned Daytime Running Lights (DDRL)
Yep, you can just pull the fuse for them in the dash side fuse panel. I forget the specific fuse # as it's been a while but it'll be in the owner's manual. Want to say #16 but it's been long enough one should double-check before just pulling it.

Richard
 

AuroraGirl

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The Internet has "fixes" for Damned Daytime Running Lights (DDRL)

They've been disabled on all my vehicles. There's no USA Federal requirement for them; there's no peer-reviewed science that says they're effective. All the crap GM promotes for them is junk science--most of it conducted in the Baltic Socialist countries that accept government interference as a routine part of life, coupled to high latitude which means lower levels of sunlight similar to Canada/Alaska.

The National Highway Traffic Safety Administration (NHTSA) refuses to deal with DDRLs. If the NHTSA were functional, DDRLs would be illegal.
how feisty

I dont like how my park avenue DRL work, they engage when you put into gear and cannot be defeated normally.

This is annoying because I have had auto headlamps since my first 1990 car, but I make it a specific courtesy to not turn into like my old houses driveway without knocking down to park lamps so its not shining neighbors windows etc etc. if car is moving, they on. in park, it lets you turn off

2000 lesabre built that feature to chose to turn them off into the cars 2000-2005 AND they also made the good benefit of turning on drl/tail when wipers are on.

I would say most DRL benefits come from the periods in the day when people will drive without their headlights if they arent put on for them automatically. street lighting can make these fools dangerous.

but ive seen some modern ass cars doing this, so we never even fixed that lmao

But ultimately, in this current year ,nothing wrong with DRL if it can be defeated and is not your low beam lamps that source the,.But it would be overstatement to say its world changing


AMBER TURN SIGNALS, now those save lives.
Im not 100% certain passenger mirrors are still required yet or not, but all I know is that youre really worked up over a benign thing on most of those cars.

Im going to modify my park avenue with a simple enough mod so that it can be turned off. while moving

ALSO, 1990 canadian vehicles needed DRL factory, they used Key on 6 volts across a lamp set, often the headlights. GM and ford like 9007 in a lot of stuff, so your headlights burnt out way more, ford and GM also undersized their electrical systems so that was ****** I bet, and gm drifted toward 9005/9006 combos and then just using 9005 at 6 volts for drl;, but not always.

canadian regs wouldnt allow my park avenue then, since it would not have DRL at key on engine runnin
 
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