Power Cell Wiring (Final Draft)

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Major System Category: ISIS Wiring
Task:Finalize ISIS Schematic
Parts: N/A
Prerequisite Tasks:
Additional Costs: N/A
Time Requirement: 10 hours
Date Started: March 5, 2013
Date Completed:  March 10, 2013
ISIS is a microprocessor based electrical system that has decentralized the fusing to power cells. Each power cell handles 10 circuits. Each circuit is fused at the power cell. The power cells are connected to a master cell (which is really nothing more than a traffic cop for signal processing between power, peripherals and switches) via a data bus. This electrical system (as is true with most vehicles) is separate from the ECU system that handles engine sensors, feed back and gauge related measurements. ISIS manages the lights, the door locks, power to the windows and mirrors and so forth.

I have been kicking around the ISIS wiring schematic for over a year now. I put the first draft up in the planning phase in October 2011. Those drawings were fairly crude renderings of where I was headed. The problem is that until I got my hands on the hardware and had completed the build to point where I had the body shell installed and recognized where I could and could not run cables, none of it clicked.

I understand the basic concepts. I can wire and splice and hook connectors together. I can connect my little test battery and see things light up or solenoids fire. What clarified my understanding was handling the physical cables for the master and power cells, comparing this to the basic wiring spreadsheets and recognizing that the wire colors were not ramdom, but had a very specific coding pattern to them. It may seem obvious to others, but once I understood the pattern everything clicked.

This post deals strictly with the power wiring schematics. It does not address the bus, mega fuses, additional modules (e.g. inReserve, inLighten, inVironment). I will cover these issues in separate posts. At present, the current system supports 40 circuits, and 39 are defined.

There are four power cells, plus a master cell. As of this writing, I have 2 power cells and a master cell installed on the car. I started with the basic 3 cell kit and the basic GTM set up.

Power Cell 1 wiring schematic. The following chart explains the wiring diagram. Color code matches the ISIS standard. (The only exception is circuit #5 where I used gray instead of white so it would be visible.) This projected over the front of the GTM chassis. The square that feeds all wires is the power cell box and reasonable represents where I have located it in the car.

Function	Power cell	connector	Circuit	fuse	Power cell wire
Right turn signal (front)	1	B	1	15	brown
Left turn signal (front)	1	B	2	15	Violet
Ignition	1	b	3	25	light green
starter	1	b	4	20	light blue
headlights	1	B	5	20	White
Fog lights	1	A	6	15	Yellow
High Beams	1	A	7	20	Blue
DRL	1	A	8		Green
Horn	1	A	9	10	Orange
Fan Override	1	A	10	25	Tan

Function	Power cell	connector	Circuit	fuse	Power cell wire
Right turn signal (rear)	2	B	1	15	brown
Left turn signal (Rear)	2	B	2	15	Violet
brake	2	b	3		light green
Left seat heater	2	b	4		light blue
right seat heater	2	B	5		White
parking brake	2	A	6		Yellow
Rear sensors	2	A	7		Blue
Fuel Pump	2	A	8		Green
tpms	2	A	9		Orange
Hatch popper	2	A	10		Tan

Power Cell 3 wiring schematic. The following chart explains the wiring diagram. Color code matches the ISIS standard. (The only exception is circuit #5 where I used gray instead of white so it would be visible.) This projected over the front of the GTM chassis. The square that feeds all wires is the power cell box and reasonable represents where I have located it in the car.

Function	Power cell	connector	Circuit	fuse	Power cell wire
right window up	3	B	1		brown
right window down	3	B	2		Violet
left window up	3	b	3		light green
left window down	3	b	4		light blue
left door popper	3	B	5		White
right door popper	3	A	6		Yellow
telescoping steering	3	A	7		Blue
hot plug	3	A	8		Green
front sensors	3	A	9		Orange
Map Lights	3	A	10		Tan

Power Cell 4 wiring schematic. The following chart explains the wiring diagram. Color code matches the ISIS standard. (The only exception is circuit #5 where I used gray instead of white so it would be visible.) This projected over the rear of the GTM chassis. The seat heaters is an approximate location inside the cockpit. The square that feeds all wires is the power cell box and reasonable represents where I have located it in the car.

Function	Power cell	connector	Circuit	fuse	Power cell wire
escort 9500 ci	4	B	1		brown
ars global	4	B	2		Violet
homelink	4	b	3		light green
wiper	4	b	4		light blue
side mirror	4	B	5		White
interior lights	4	A	6		Yellow
hot plug	4	A	7		Blue
cruise control	4	A	8		Green
dash/Parking	4	A	9		Orange
	4	A	10		Tan