No lights. The heater is on the same circuit and relay as the main filter pump. When the relay is turned on, the heater doesn't come on anymore. Is there a fuse or something inside the heater I could look for?

If you changed the fuel pump and the fuel filter and ignitor and regulator,in the list of changes do you know you have a EFI. The EFI main relay turn on the fuel pump which includes the circuit opening relay. Testing it mainly passes with flying colors just replace

The two things that usually cause that type of stall are a bad main relay or a bad distributor. Have them checked out.

EE 2 can be caused by a couple of things but is usually a fuel issue or a flame rod problem. The circulation fan will not come on until the burner has warmed up. The combustion blower should start almost as soon as you turn the heater on. Turn the heater on and listen for the combustion blower. If it doesn\'t start, do you get an error code? If the blower started wait for the fuel pump to come on. It will start when the burner lights come on. If the fuel pump makes a loud ticking or thumping sound, it isn\'t getting any fuel. Check the fuel filter and the strainer in the fuel sump. Make sure the valve is turned off at the barrel before removing the fuel strainer. If the fuel pump is working normally, does the heater light up. If it doesn\'t, check the igniter. You can check that first if you want and have a clamp on ammeter. Place it around one of the igniter leads and you should read 2 to 4 amps when you turn the heater on. If the heater does light but then cuts off after about a minute, clean the flame rod. Unplug the heater before removing the flame rod because it may kill the circuit board if the heater is plugged in and the flame rod touches ground. Let me know what you find.

Another option would be to get an electronic timer like the Intermatic P1353 that has 3 circuits on it that you could program to cut on and off at different times. For example, you could have one circuit that controls the pump and turns the pump on, then the second circuit would turn on the booster pump at a set time after the filter pump had come on and then the heater could be set to also run at a preset time after the pump circuit was activated. Since the pump, booster and heater are all 220, it's a straight forward hookup with everything in one timer box.

The lights, as stated before, would be on a separate circuit (110) and have its own timer or photosensitive eye set in line.

Hi
Main wash is a fault indicator. The is a problem within the heater circuit, NTC, element, relay or loose wire. You will have to open front and check.
Remove 3 screw around dispenser and 3 10mm bolt around door. disconnect hose by drain pump and front of machine will open like a door.

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

These older style controls are easily repaired but require some electrical diagnosis expertise to determine the problem.
1. Check the pressure switch to make sure it is working properly - Use a continuity checker to see if the pressure switch is closed when pump is running. If not then check for proper water flow. Dirty filter, obstruction in plumbing. If flow is good, replace the pressure switch and see if heater works.
2. Check to see if the heater has 220V at the heater terminals when heater circuit is running. If not, then check to see if the heater contactor (relay) is actuating. Check Hi-limit switch, Thermostat and pressure switch for continuity. If heater has voltage, check for current draw, using a clamp style amp meter around on of the heater wires. look for about 20 amps. If voltage is present but no current draw, the heater is bad.
3. The spa light is a completely separate circuit, check the air switch, air line, button and light bulb. Its a 12V AC circuit.

Chances are that you have a bad relay, but the problem could be the main logic board. If there is a spare relay in the box switch all the wires from the pump relay onto the spare. Remember to shut off the breaker, and also you will need to change the wires on the top of the relay too, or you will have to do some reprogramming.

The relay is probably bad. If you open up the main outdoor panel, you can watch the bottom of the relay for the pump, ususally on the upper left of the relay cluster (black). Watch for a small tab popping out when turning on/off. If you don't see it, the relay is bad. This assumes you hear a click when doing this.

Found These Fault Codes On Internet, Hope This Helps, Daz

ALARM CODES

E00(E00)- Problems with water fill during washing
-Tap closed; solenoid valve, water distributor, wiring ,main PCB, pressure switches

E01(E00)- Problems with water fill during drying
-Tap closed; solenoid valve, wiring , main PCB, pressure switches

E10(E10)- Problems with water drain during washing
-Drain hose kinked, filter blocked, drain pump, water distributor, wiring , main PCB, pressure switches

E11(E10)- Problems with water drain during drying
-Drain hose kinked, filter blocked, drain pump, pressure switches

E20(E20)- Door open
-Cycle in Door delay, wiring , main PCB

E21(E20)- Fault in door delay power triac
-Wiring , main PCB

E30- Fault in electronic pressure switch
-Electronic pressure switch, wiring , main PCB

E31- Fault in electronic pressure switch circuit
-Main PCB (fault in electronic pressure switch circuit)

E32(E10)-Calibration error in electronic pressure switch
-Electronic pressure switch, drain pump, wiring , main PCB, filter blocked

E33- Incongruency between electronic pressure switches and safety switch 1
-Electronic pressure switch, safety pressure switch,wiring, main PCB

E34- Incongruency between electronic pressureswitches and safety switch 2
-Electronic pressure switch, safety pressure switch,wiring, main PCB

E35- Intervention of anti-overflow pressure switch
-Solenoid valve, water distributor, wiring, main PCB,anti-overflow pressure switch

E36- Water leakage (maximum number of resets exceeded)
-Water leakage, drain hose too low, pressure switch,wiring, main PCB

E40- Motor power triac short-circuited
-Main PCB (triac short-circuited)

E41- No signal from tachimetric generator
-Tachimetric generator on motor, wiring, main PCB

E42- Fault in tachimetric generator circuit
-Main PCB (tachimetric generator sensing circuit)

E43- Intervention of motor overload protection
-Motor, wiring, main PCB

E50- Insufficient heating during wash phase
-NTC sensor setting incorrect, heating element, wiring,main PCB

E51- Overheating during wash phase
-Heating element (to earth), main PCB (relays)

E52- Insufficient heating during drying phase
-NTC sensor setting incorrect, safety thermostat,thermostats, drying heater, wiring, main PCB (relays)

E53- Overheating during drying phase
-Drying heater (to earth), main PCB (relays)

E55- Fault in power relay for heating element (K3)
-Safety pressure switch 2, wiring, main PCB- 6 -

E60- Fault in washing NTC sensor
-Washing NTC sensor, wiring, main PCB

E61- Fault in drying NTC sensor(condenser)
-Drying NTC sensor (condenser), wiring, main PCB

E62- Fault in drying NTC sensor(duct)
-Drying NTC sensor (duct), wiring, main PCB

E63- Fault in 1/2 power thermostat
-Drying NTC sensor (duct), 1/2 power thermostat, wiring,main PCB

E70- Power triac to distributor motor short-circuited
-Main PCB (triac short-circuited)

E71- Fault in power relay to distributor loads
-Main PCB (relay open)

E72- No distributor position signal
-Water distributor motor, wiring, main PCB

E73- Incorrect timing on distributor contacts
-Water distributor, wiring, main PCB

E90- Fault in tank fill pump
-Hoses obstructed, tank fill pump, wiring

E91- Fault in tank drain pump
-Hoses obstructed, tank drain pump, wiring

E92- Fault in power triac to tank fill pump
-Tank fill pump, wiring, main PCB