LED 1 & 3 Do Not Light, Tester In Position 1

Fig. 4 LED Identification:

Fig. 1 ABS Control Unit Connector Terminal Identification:

Refer to Fig. 4, for LED identification numbers. Weaker illumination of an LED indicates a contact resistance in respective circuit.
1. Check for continuity between ABS control unit connector terminal 34 and ground, at battery ground cable (LED 1). Fig. 1.
2. Check for continuity between ABS control unit connector terminal 10 and ground, at battery ground cable (LED 3).
3. If continuity does not exist, repair circuit for short or open.