Headlights stay on all times on this 1999 npr Isuzu diesel. What are the most likely parts would the npr need please?thank you, Hershel. The fuses are good. The relays are good.

try dealer

Yah see a dealer, you will need a scan tool.

not sure if this will help you out but go to this link and scroll to the bottom of the page and on the left its gives you on how to do it... How do you change headlights on 1990 Isuzu NPR box truck Google Search

Sorry we do not have wiring diagrams for this car

Julie
what year NPR 1998
what weight class.?
if not sure post a photo of the beast. !
sorry not all NPRs are the same, not EVEN close.
so not listen to the net rumors, why trust your life to rumors>?

read this, (where are you?)

The fifth generation Isuzu Elf appeared in July 1993, with more sculpted headlights.
In May 1995 it received a minor change, including upgraded, cleaner diesel engines.
An OEM deal with Nissan led to the Elf also being sold badged as a Nissan Atlas and a Nissan Diesel Condor 20/30/35 beginning at this time, followed by the Nissan Atlas Max from 1996 until 2000. The Atlas Max was based on the new, lighter duty Elf 100 (June 1995) which was available with a 2-liter petrol or a 2.5 or 2.7-liter diesel engine.[20]
In May 2004, subsequent to a few minor changes, the Elf underwent a more major facelifts with new, larger, trapezoidal headlamps.
Another OEM deal was forged at this time and the Elf was now also marketed as a Mazda Titan in parallel.
In Malaysia, this truck is manufactured by Heavy Industries Corporation of Malaysia (Isuzu HICOM Malaysia) under the name of HICOM Perkasa, but carrying the Isuzu N-Series Commando badge.
? 100ft/lbs is a good guess, but is but a guess.

this is no heavy truck forum. its only light and cars.
NPR what, (the number)
and what engine? fuel parts match up to and engine.
no year NPR. wow. and have gas or diesel engines.
no fuel stated either.
NPR started in USA in 1985 (this is USA forum)
this?

first off
no country stated
the books are indexed by
country
year 2002
isuzu NPR heavy truck
ask Isuzu for matching FSM book at your dealer.>
factory service manual.

shorts
remove all loads on the feed F14.
then add them 1 by 1 until it blows. bingo. last add is shorted
id bet ecu and glows are not same feed
glows suck huge current
ecu, nill

join a read isuzu forum
or heavy truck?

Diesel !
cam ? timing? or the injector pump... ??????
ask Isuzu for a book.
wiki says, what is a space cab.>?? a 4,000 lb truck./van, sure.

The 4BE1 is a 3.6L direct injection engine. It replaced the 4BC2 in Isuzu NPR's from 1987- non turbo, VE rotary injection pump or Zexel/Diesel Kiki A-type injection pump. Bore and stroke are both 105mm. Power ratings in the last versions (NKR300)are 74 kW (100 SAE HP) at 3,500rpm and 242 Nm at 2000rpm.

fuel pump shot or fuel injectors plugged also check for loose wiring by your tank or by the injectors

Don't have this.