On my cable, I didn't use a diode or a resistor. Just soldered the comm wire to both TX and RX, and the ground to ground.
On my cable, I didn't use a diode or a resistor. Just soldered the comm wire to both TX and RX, and the ground to ground.
1990 Chevrolet K2500, RCLB, Blueprint 383 TBI (16197427 ECM / 61 lb/hr / 16 psi FP), NV4500, NP241C, 4.10
I used a 1k resistor on the RX and a 1N914 diode on the TX. Diode cathode or stripe goes to the TX terminal. Connect the other ends of diode and resistor together to go to the ALDL data terminal. ALDL ground terminal goes to the ground terminal of the adapter.
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