Will idle but will not excalerate and insrument panal is out

U1900 FORD - CAN Communication Bus Fault

Read more: https://www.autocodes.com/u1900_ford.html
Possible causes
Faulty / intermittent ignition switch connections
CAN Bus wiring intermittently open/shorted to power or ground Faulty / intermittent connection at PCM
Faulty electrical connections at ABS Control Module
Faulty electrical connections at the instrument cluster
Poor connections at the trailer brake controller/trailer connector

Tech notes This is typically a false/intermittent code. It can occur if: Someone hooks up a scanner to the OBDII port while the ignition is on or while the engine is idling. A trailer brake system is installed improperly/incorrectly on a truck with ABS (anti-lock brakes).

When is the code detected? When the PCM, Brake Controller and Instrument Cluster are unable to communicate with each other at any time while the ignition switch is turned to the "Run" position, code U1900 sets in memory.

Possible symptoms Engine Light ON (or Service Engine Soon Warning Light) Amber ABS (Anti-lock Brakes) Light ON Wrench Light On

U1900 Ford Description The Anti-ock Brakes System (ABS) module, the Powertrain Control Module (PCM), and the instrument cluster communicate over the Controller Area Network (CAN) Bus. This is a high-speed bus communication system and is not fault tolerant, which means any type of intermittent/loose connection between these 3 controllers will cause communication to stop. When the PCM, ABS module and instrument cluster are unable to communicate with each other at any time while the ignition switch is turned on, code U1900 will set.

Read more: https://www.autocodes.com/u1900_ford.html

Fuse is the first. Second most is a bad connection at the instrument panel.

if your speeking of none of the insrument light illuminating, but headlghts work, then it's the headlight switch that's bad,the headlights will go out very soon though, it basiclly stages down, partial burnout starting with insrument panel. not too hard to change though. abt 50 bucks for the switch give or tk a few

Could be in switch panal or if the system works off of vacumm you could have a cracked line or maybe one off. hope this helps. In most cases wiht ford it is in the switch panal...good luck

Any performance testing re auto A/C requires consistant engine revs highway revs eg 1800 exit ramp eg idle stop start 800revs leading to much reduced A/C compressor speed and therefore performance output .Also all testing its desirable to close the bonnet to control design air flow through the engine bay .Also check under dash passenger side air flow pos a filter on return air duct or something sucked up into paper etc .good luck!

10 amp fuse labeled instrument cluster also protects idle sensor on diesel models

There is a small voltage regulator in side the dash that controls the gages its on the back of the instrument panal over the speedometer you need to remove the panal to get is it conects almost like a 9 volt battery that the conector likes like but its a lot smaller in side

under dash fuse box, middle row, 8th fuse down. That fuse is also for:
Auxiliary Powertrain Control Module
(APCM) (Diesel only), Instrument Cluster,
GEM Module, Overdrive Cancel Switch, Idle
Validation Switch (Diesel only), Overhead
Console, Diesel PCM via Clutch

gm had various problems with insrument panel, there was a recall on this problem.new instrument panel is very expensive try finding a used one

Check And See If The Fuse For The Insrument Cluster Has Not Blown Its In The Fuse Panel