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Where is the low air pressure alar on a 2001 peterbilt 379

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

HansPP
  • 2510 Answers

SOURCE: Have a 2004 Peterbilt 379, looking for Specs for

Have a look at this site, it gives a comprehensive description for setting headlights:-
http://www.300cforums.com/forums/lighting-discussion/49644-aiming-headlights.html


However, headlight adjustment must conform to the relevant road ordinances and laws of the place of vehicle registration. For your own peace of mind and to comply with legal requirements I suggest that you take the vehicle to a registered center and have the lights set to the standards set by law.

Posted on Mar 04, 2011

  • 5480 Answers

SOURCE: Have a 2004 Peterbilt 379, headlight setting is

Yes, if you are running over- the- road just stop in a State that has vehicle inspections and they can set the lights to their specs. In those States that have an inspection setting the headlight aim is part of the job.

Next method, park your unit about 20 feet from a garage door or the side of a building or carwash. Use some tape or pencil and make 2 crosses. The passenger side is allowed to be high and slightly to the right. A correctly aimed right headlight will focus on the curb or lane marker with the right headlight spot-on the lane marker. This will mean you will be safely within your lane on the right side of your truck as long as the headlight hits the lane marker.

For the left light it is suppose to be almost straight ahead and not tipped out to oncoming traffic. In some States the left light is turned slightly towards the center of your truck. You can check against the crosses you put on the surface of the building and watch the beams move as you adjust the lights. Use some chalk to mark where the tires were so you can get into the same spot.

I had to do some Vehicle Inspections in Texas years ago. I want to say the headlights were suppose to be 42" high at 20 feet, but you have a Peterbuilt. And now some of the cars are barely 48" high.

Posted on Mar 04, 2011

Testimonial: "Thanks"

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SOURCE: Air valve leaking air thru it when u release

If it's the same air valve that releases the parking brake then replace it so the brakes won't drag because of low air pressure. Air is APPLIED to release the brake so if the system air pressure starts to go low the parking brake will start to apply. This will eventually cause the brake drum to overheat and possibly start a tire fire.

Posted on Jan 14, 2014

charlesbe45730
  • 1917 Answers

SOURCE: 2009 379 Peterbilt no oil pressure all of a sudden

ether bad gauge or oil pump went out check oil oil pressure sending unite with pressure gauge if pressure bad sending unit if no pressure there you are in trouble and its going to cost a lot of money to put a new oil pump in it might be covered under warranty it depends on the warranty if they replace the pump or not i would check warranty good luck

Posted on Dec 17, 2014

claudeinmo
  • 9098 Answers

SOURCE: All my gauges on the dash stopped working and I've checked fuses with no luck. Any thoughts? 2006 Peterbilt 379

PDF]Peterbilt Conventional Trucks Operator's Manual prior to 12-06

www.peterbilt.com/.../Supplemental%20Manuals/Prior%20to%2...
PeterbiltThere will be times when you need to take this manual out of your. Peterbilt. ..... For Model 379 vehicles built on or after 5/1/98 with SRS: Gently pull the turn ...

Peterbilt Atlantic Tech Tips: Dashboard Indicators & Warning ...

? 4:36
www.youtube.com/watch?v=5Hh7AlwchdY
Jan 28, 2013 - Uploaded by peterbiltatlantic Visit Peterbilt Atlantic online anytime at http://www.Pet... ... 2015Peterbilt 389 Owner Operator Cummins 550 18 Speed 23 Gauges21 switches ...

Posted on Sep 04, 2015

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Air valve leaking air thru it when u release tractor parking brake 1999 379 Peterbilt


If it's the same air valve that releases the parking brake then replace it so the brakes won't drag because of low air pressure. Air is APPLIED to release the brake so if the system air pressure starts to go low the parking brake will start to apply. This will eventually cause the brake drum to overheat and possibly start a tire fire.

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