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Latest Isuzu Repair and Brakes Installation Advice

CarJunky AutoAdvice

Isuzu Box Truck

Showing 4 out of 4 Posts
Question From Aaronein on Isuzu Box Truck

I have an Isuzu NPR box truck that the brake light on the dash keeps coming on. What might be causing this?

Response From koontzy

if its only the break and no abs light i would be willing to bet your brake reservoir is low due to a leak or that your brake pads need replaced

Response From Tom Greenleaf Top Rated Answer

Please stop posting on threads "koontzy" until you get the idea. This thread locked up too as now over a year old.
OPs can ask for closed threads to be reopened so locking this one too,


Response From Tom Greenleaf

Year, engine and more info can only help when posting please.

What brake light? Red? Most mean parking brake (may not go fully off due to cables or something) or low brake fluid and find out why it's low.

ABS if equipped is usually an amber light and all I know default to regular braking action if lit. Different approach on what to check if so,


1994 Isuzu Box Truck, Vacuum Issue

Showing 3 out of 4 Posts | Show 1 Hidden Posts
Question From trathson on 1994 Isuzu Box Truck, Vacuum Issue

I have a 1994 Isuzu box truck, and the vacuum light has started coming on whenever I let off the gas, and the vacuum itself quits working after the first second or two of when the brakes are applied. Resulting in the driver having to ram their foot into the brake pedal to keep the truck stopped.

If the truck is switched to neutral, the problem goes away entirely and the brakes function perfectly with no vacuum light alarm.

Does this sound like the vacuum pump to you guys, or not really?

Response From Tom Greenleaf

? A "box" truck? Tell me/us, does this have a belt driven vacuum source or use intake manifold vacuum? IDK which.

Duh - no vacuum for vacuum boosted brakes means little braking help no matter how vacuum is had for the booster or booster itself?


Response From trathson Top Rated Answer

Ok, please forgive my ignorance, I'm not a mechanic. I can just fix things if pointed in the right direction.

I'm not sure if its intake or belt, is there a way I can find out? Here are some pictures of the problem in question, would some experienced eyes be able to point out to me the vacuum... manifold? Or whatever it is called.



Response From Tom Greenleaf

OK - Both pics don't show what I was looking for. Only an alternator in one and an idler pulley in another. I'm really looking for what is behind the master cylinder for a booster and just look for a hose on any booster and where it goes.

Some (doubt this vehicle but possible) will use PS pump fluid pressure called "hydro-boost" still again a unit behind master cylinder with they PS hoses going to it.

OK - So you don't know what system it is and can come and go as said. All types could. Low PS fluid would almost always effect PS as well but make sure it's filled properly just anyway.

Others use a vacuum hose to a, well, large Whoopie Cushion like booster behind the master cylinder. That hose must be good right from there to intake (can get oily on some and fail there) or to a vacuum pump I didn't see but could be hiding. Issue would probably be loose belt if it does do it that way.

Vacuum boosted also uses a check valve and rubber grommet at the booster.

Any can fail in assorted ways. If a hose get the right rated hose frequently by the foot.

Pulling the check valve out booster should go "whoosh" meaning it's holding vacuum. Grommet may fail just taking check valve out so have grommet (somewhat universal) at the ready if you try that.

It would be a lot easier to know what system this is to ask you to target the problem area without writing a whole repair manual for all types possible,


Brake repair

Showing 2 out of 3 Posts | Show 1 Hidden Posts
Question From mike1234 on Brake repair

Can not get rotor uninstalled. Removed caliper, rotor bolts, axle cover plate, can not see how to continue. Any help appreciated.

Response From Guest

what kind of car is it?

Response From mike1234 Top Rated Answer

Ooooops. '99 Isuzu Trooper. Front rotor.

2003 Isuzu Rodeo Slow Start

Showing 2 out of 2 Posts
Question From shorcher04 on 2003 Isuzu Rodeo Slow Start

2003 Isuzu Rodeo 6 cyl 93k

Previous post explained "fuel injection clean" from a Tire store resulting in slow start after engine is hot and then cools down. (about a week ago)

Thanks for the posts, helped move things forward.

Investigating the Vacuum Hose where they put the "fuel injection cleaner" - this was the brake booster vacuum hose. Has a particular shape, so it appears to be a dealer part.

Looking into that hose, I noticed a Brake Booster Check Valve was called out. This seemed like a part to investigate - maybe by cleaning fluid affecting this valve.

I cannot seem to find any reference to a specific part number, wonder if it actually exists on this vehicle. Would like to locate a diagram and part numbers, etc. before I go pulling things apart.

Any recommendations on a source for good documentation? Hate to go buy a $30 book and find out it doesn't help...

Response From Hammer Time Top Rated Answer

Please don't duplicate questions. Post your follow ups to your original question.

No hazard lights isuzu rodeo

Showing 2 out of 2 Posts
Question From naanth01 on No hazard lights isuzu rodeo

I have a 2000 Isuzu Rodeo. First, the left blinker would not work and would buzz when I engaged the left blinker. Later, the blinkers would not work, brake lights did not work when I turned on the head lights unless I had my foot on the brakes, so I found that the fuse blew. Replaced the fuse, but when I turned the headlights on the left blinker would be solid green on the dash, but the right blinker would flash when engaged but not stay on when right blinker was not engaged. Last night the fuse blew again and now blows fuses immediately. I am going to check the rear lights to make sure there are no shorts and melted wires. The rear window wiper has never worked also. Please let me know what I should do. Greatly appreciated!

Response From Discretesignals Top Rated Answer

I am going to check the rear lights to make sure there are no shorts and melted wires.

When you do that let us know. If you still have the issue, we'll advise.