Rodeo engine wiring confusion

Hope this helps. It's for a 2004 eclipse remote start.

12volts white/red (40A) + ignition harness
Starter black/red + ignition harness
Second Starter N/A
Ignition green + ignition harness
Second Ignition N/A
Third Ignition N/A
Accessory blue/red + ignition harness
Second Accessory blue/black + ignition harness
Keysense blue/red ignition harness
Notes: This wire rests at ground, and goes to an open circuit when the key is inserted into the ignition cylinder.
Power Lock purple - pin 33 at ETACS ECU
Notes: The ETACS ECU is attached to the back of the fuse box.
Power Unlock lt. green/red - pin 34 at ETACS ECU
Notes: The ETACS ECU is attached to the back of the fuse box.
Lock Motor lt. green 5wi pin 19, 28 pin plug below fuses
Unlock Motor green/red 5wi pin 22 at ETACS ECU
Notes: The ETACS ECU is attached to the back of the fuse box.
Parking Lights+ green/white + pin 2, 15 pin plug above fuses
Parking Lights- N/A
Hazards green - pin 55 at ETACS ECU
Notes: The ETACS ECU is attached to the back of the fuse box.
Turn Signal(L) green/blue + pin 8, 15 pin plug above fuses
Turn Signal(R) green/yellow + pin 13, 15 pin plug above fuses
Reverse Light red/blue + pin 9, 43 pin plug in driver kick
Door Trigger see notes - see notes
Notes: The driver door trigger is lt. green, pin 6, in a 15 pin plug above the fuses. The passenger door is lt. green/black in pin 65 at the ETACS ECU. Use both wires and diode isolate each.

The ETACS ECU is attached to the back of the fuse box.
Dome Supervision green/orange - pin 1, 3 pin plug above fuses
Trunk/Hatch Pin red - pin 62 or 37 at ETACS ECU
Notes: It is in pin 62 on the coupes, and in pin 37 on the convertible spyders.

The ETACS ECU is attached to the back of the fuse box.
Hood Pin green/red - pin 24 at ETACS ECU
Notes: The ETACS ECU is attached to the back of the fuse box.
Trunk/Hatch Release green/white 5wi pin 32 at ETACS ECU
Notes: The ETACS ECU is attached to the back of the fuse box.
Power Sliding Door N/A
Factory Alarm Arm lt. green/black - pin 42 at ETACS ECU
Notes: Meter this wire while turning the key in the driver door key cylinder.

The ETACS ECU is attached to the back of the fuse box.
Factory Alarm Disarm orange - pin 25 at ETACS ECU
Notes: Meter this wire while turning the key in the driver door key cylinder.

The ETACS ECU is attached to the back of the fuse box.
Disarm No Unlock blue/red - pin 27 at ETACS ECU
Notes: Meter this wire while turning the key in the hatch/trunk key cylinder.

The ETACS ECU is attached to the back of the fuse box.
Tachometer white or black/white ac engine speed detection connector
Notes: The engine speed detection connector is a single pin connector in the fuse/relay box under the hood.

Can also go to one of the ignition coils or the distributor assembly and use the black/blue or white/green wire.
Wait to start N/A
Brake Wire green/orange + brake pedal switch
Parking Brake yellow/green - parking brake switch
Horn Trigger lt. green/black - pin 44 at ETACS ECU
Notes: The ETACS ECU is attached to the back of the fuse box.
Memory Seat 1 N/A
Memory Seat 2 N/A
Memory Seat 3 N/A
Interface Module: Category:
Immobilizer Bypass Required:
Yes Type:
Transponder
Part #: 556UW
Alternate Part1 #: DesignTech 20402
Alternate Part2 #: DesignTech 29402
Notes: Standard on all models.

Good luck.

here are the wire colors and what each does.
1994 Isuzu Rodeo Car Audio Wiring Guide
Car Radio Battery Constant 12v+ Wire: Red/White
Car Radio Accessory Switched 12v+ Wire: Brown/White
Car Radio Ground Wire: Black
Car Radio Illumination Wire: Red/Green
Car Stereo Dimmer Wire: Red/Yellow
Car Stereo Antenna Trigger Wire: N/A
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: 4′
Car Audio Front Speakers Location: Dash
Left Front Speaker Positive Wire (+): Blue/Yellow
Left Front Speaker Negative Wire (-): Yellow
Right Front Speaker Positive Wire (+): Green/White
Right Front Speaker Negative Wire (-): Gray/White
Car Audio Rear Speakers Size: 4′
Car Audio Rear Speakers Location: Side Panels
Left Rear Speaker Positive Wire (+): White
Left Rear Speaker Negative Wire (-): Red/White
Right Rear Speaker Positive Wire (+): Orange
Right Rear Speaker Negative Wire (-): Black/Orange

Abbreviations used :
CJB ( aka Central Junction Box, cab fuse panel )
BJB ( aka Battery Junction Box, Engine Compartment fuse panel )

In the factory connector :

Hot at all times from CJB Fuse #1 is pin #9, light green w/ violet stripe wire
Hot in start from CJB Fuse #20 is pin 3, Red w/ black stripe wire
Hot in Accessory or run from CJB Fuse #8 is pin 10, Black w/ Pink stripe wire.

Grounds in the connector :
pin 2, black
pin 11 black w/ light green stripe
pin 16 black w/ light green stripe.
pin #1 light blue w/ red stripe is the instrument illumination, after the cluster dimmer switch.

I would stay away from using the black w/ light green stripe, I seem to recall those are the shields for the speaker pairs.

Bit late on the reply, just caught this one. If you don't have it don't, good luck

Have fun.

1995 Isuzu Rodeo Stereo Wiring Constant 12V+ Red/White Switched 12V+ Brown/White Ground Black Illumination Green/Red Dimmer n/a Antenna Right Front Front Speakers 4" Dash Left Front (+) Blue/Yellow Left Front (-) Yellow Right Front (+) Green/White Right Front (-) Gray/White Rear Speakers 4" Side Panels Left Rear (+) White Left Rear (-) Red/White Right Rear (+) Orange Right Rear (-) Black/Orange

1995 Isuzu Rodeo Stereo Wiring Constant 12V+ Red/White Switched 12V+ Brown/White Ground Black Illumination Green/Red Dimmer n/a Antenna Right Front Front Speakers 4" Dash Left Front (+) Blue/Yellow Left Front (-) Yellow Right Front (+) Green/White Right Front (-) Gray/White Rear Speakers 4" Side Panels Left Rear (+) White Left Rear (-) Red/White Right Rear (+) Orange Right Rear (-) Black/Orange

http://www.the12volt.com/installbay/vehicles.asp try this site out and see if it will help you.

Could be a failed crimp on a solder-less connector. Take it in to a high end radio installer and explain it to them like you did here. If your alarm is still functioning normally then its just a small wire off the LED leads that's not completing a circuit.