Wiring Details...
(updated 01/30/01)
| Description | Toyota 1991 FJ-80 4.0L 3F-E Wire Color (Pri-Sec) / Conn. | Chevy 1992 C-1500 350 TBI Wire Color (Pri-Sec) / Conn. |
| Neutral Safety Switch | Blk-Red / N1 - Pin 2 | Starter Solenoid |
| Igniter & Coil | Blk-Grn / I3 | Pnk / C111 |
| GM Battery Distribution Block | V+ / Battery Post (+) | Blk-Rd / Fusible Link Ring Lug |
| Ignition - ECM | Blk-Blu / IH1 - Pin 20 | Pnk-Blk / Conv. Center |
| Fuel Pump Relay & ECM Batt (V+) | N/A | Org / GM Batt. Junction Block |
| Injector V(+) | Blk-Grn / IH1 - Pin 21 | Red / Conv. Center |
| Tachometer | Blk / IH1 - Pin 5 | Wht / Conv Center |
| Oil Pressure Sender | Wht / IH2 - Pin 1 | Tan / C167 |
| Water Temperature Sender | Grn / IH2 - Pin 2 | Drk Grn / C169 |
| A/C Clutch | Blk-Wht / IH1 - Pin 10 | Drk Grn / C260 - Crt. 59 |
| Check Engine Lamp | Yel-Wht / IH1 - Pin 13 | Brn-Wht / IP - Crt.419 |
| 4WD Indicators Ground (-) | Wht-Blk / EC1 - Pin 10 (to body) | N/A |
| Vehicle Speed Sensor (Aftermarket, 2000 ppm) Disconnect DRAC buffer and feed ECM directly. | Blk-Wht / IH1 - Pin 3 Grn-Red / IH1 - Pin 24 (Ground) | Brn / IP - Crt. 437 Other side grounded |
| Charge Indicator Lamp | Yel-Wht / A6 - Pin 2 "L" | Alternator Terminal "L" |
| Fuel Pump | Red-Grn / IH1 - Pin 8 | Gry / C132 - Crt. 120 Fuel Pump Relay |
| Alternator charge output | White large gauge wire (also tie black smaller wire to charge post ) | Charge output terminal post on GM alternator |
| Alternator charge lamp circuit | Yell-Wht /A6 - Pin 2 | Brn / "L" terminal out of GM alternator connector |
These are the connections I have made and verified as correctly operational. Please use this only as a guide and double check any wiring with the appropriate diagrams for your vehicle before applying power. Should I make any changes or improvements to the wiring interface, I will update this page accordingly.
I am currently awaiting the arrival of a tachometer interface from Mark's Adapters that will allow the tach to accurately display the 8 cylinder rpms. It will insert between the GM tach output and the Toyota gauge input. Using only the wiring above, the tach will read approximately 25% higher than actual rpm.
