1994 isuzu rodeo not start baterry is good fuses are ok

Park interlock switch bad

Check connection battery,could be starter.

http://www.manualsonline.com/

Try here

This may actually be a problem with the starter solenoid and not the neutral safety switch. If when you try to start the vehicle and you are only getting a clicking, then I would replace the starter solenoid which is typically found on the passenger side firewall. If not there, then on the starter itself.

Because of the load. It will drop in voltage, this is normal. As long as it stays above 12 you will be fine. But just to be sure start the car and turn everything on, then check the voltage. If it stays at 12.7 it's good.

Classic symptom of a dead battery ,give it good charge and if need be renew the battery

YOU NEED TO CHECK ALL THE FUSES WITH A GOOD FUSE TESTER. I USE A 12 VOLT CIRCUIT TESTER, { LOOKS LIKE A TRANSPARENT ICEPICK, WITH A WIRE COMING OUT OF THE BACK & AN ALLIGATOR CLAMP ON THE END OF THE WIRE}. THERE ARE TWO FUSEBOXES, 1 UNDER THE HOOD, I INSIDE THE VEHICLE. ALL FUSES CAN BE TESTED WHILE STILL IN THE FUSEBOX. THERE ARE TEST POINTS FACING OUT. POWER ON ONE SIDE ONLY, FUSE IS BAD. POWER ON BOTH SIDES, FUSE IS GOOD. POWER ON NEITHER SIDE, SPARE FUSE.

When you crank the engine are you getting a full 12 volts positive at the solenoid switch on the top of the starter?

Have you got a full 12 volts negative to the switch?

Also, check the earthing strap from chassis to engine is good.

Regards

Lloyd

Dirty terminals, happens all the time. Did you have the battery tested? Or just know it's OK? Did you check the water? How about the electrolytes? Get the terminals cleaned off with a wire brush, and scrape the insides, make sure they are tight. I have replaced more batteries this week, must be the weather. One was stone dead, 5 volts and still started the car?? Couldn't believe it, good car. The other 2 were dead with 12+ volts but wouldn't start anything, both got new terminals, and both got cleaned up. NO problems. Check it out. Lastly, the solenoid in the starter could be bad if everything else checks out, whack it with a hammer while turning the key, if it jumps, you found it.

if there is no power to the fuel pump check relays and fuses....UNDERHOOD FUSE & RELAY PANEL IDENTIFICATION Fig. 2: Underhood Fuse & Relay Panel Identification Courtesy of ISUZU MOTOR CO. Fusible Link Identification ? A - 80 Amp (1991-92 3.1L) ? A - 60 Amp Main-1 ? B - 30 Amp Main-2 ? C - 30 Amp (1993-94) ECM (3.2L) ? D - 30 Amp Condenser Fan (A/T Models) Relay Identification ? 1 - Headlight Relay ? 2 - A/C - Heater Relay ? 3 - Starter Relay ? 4 - A/C Compressor Relay ? 5 - Charge Relay ? 6 - Fuel Pump Relay ? 7 - ECM Relay ? 8 - Wiper Relay Fuse & Circuit Breaker Identification ? 1 - 15 Amp (1991) ECM, Fuel Injection System ? 1 - 15 Amp (1992-94 2.6L) ECM, Fuel Injection System ? 1 - 10 Amp (1992-94 3.1 & 3.2L) Heated Oxygen Sensor, Fuel Injection System ? 2 - 20 Amp (1991-92) Fuel Pump ? 2 - 20 Amp (1993-94 2.6L) Fuel Pump ? 2 - 15 Amp (1993-94 3.2L) Fuel Pump ? 3 - 10 Amp (1991) ? 3 - 15 Amp (1992-94) Turn Signal Lights, Hazard Warning Flasher Lights ? 4 - 10 Amp Horn, Door Locks ? 5 - Not Used (1991 3.1L) ? 5 - 10 Amp Charging System, Charge Warning Light WARNING: Always disconnect battery ground cable before servicing "high- current fuses. It is recommended that "high-current" fuses be replaced by a qualified technician. Page 1 of 2 FUSES & CIRCUIT BREAKERS -1994 Isuzu Rodeo LS? 6 - Not Used (1991) (1992-93 2.6L) ? 6 - 10 Amp (1992-94 3.1L & 3.2L) A/T Interlock System ? 6 - 10 Amp (1994 2.6L) Heated Oxygen Sensor, Fuel Injection System ? 7 - 20 Amp Heater/Air Conditioning Blower Controls ? 8 - 10 Amp Air Conditioner Compressor Controls ? 9 - 10 Amp Right Headlight ? 10 - 10 Amp Left Headlight © 2008 Mitchell Repair Information Co., LLC.

Underhood fuse block swap out relay #7 thats the ECM relay.
Ground Circuits Using a DVOM, touch negative voltmeter lead to a good ground. Touch positive voltmeter lead to each ground terminal. With vehicle running, voltmeter should indicate less than one volt. If reading is greater than one volt, check for open, corrosion and loose connection on ground lead. See ECM GROUND LOCATION table for ECM ground location.
Page 1 of 1 SYSTEM/COMPONENT TESTS - 2.6L EFI -1994 Isuzu Rodeo