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Color wire ! Blue an gray are to the PCM - engine computer ,red is power to the alternator from fuse F1.10 - 10 amp. in the under hood fuse box . The heavier gage wire on the back of the alternator has an inline 175 amp fuse ,an should show B+ voltage . There is no orange wire , red ! may be faded . Explain voltage out of three pin alternator . The heavier gage wire on the back of the alternator goes to the battery an carries charging current to battery an electrical system .
Blue wire to ignition switch,from alternator voltage regulator.( 12 volts ) ECU power wire, Red wire to battery terminal. Blue wire goes from alternator to the ignition switch. The voltage regulator senses the incoming voltage from the blue wire. ) it grounds the green field wire This energizes the alternator field, and the alternator begins to produce a charge and sends it to the battery via the main output wire. When the voltage regulator senses 14 volts from the blue field wire, it cuts the ground to the green field wire. Good-Day!
The green wire should be your gen field wire not a ground wire. The alternator should be grounded through the alternator. The blue wire should be a feedback to the pcm only when the alternator is charging (engine running). Make sure your main 140amp charging fuse is good. It also has a battery temperature sensor that controls the field to the alternator. Wire 15 on ecm pnk/yellow to wire 4 blk/lt blue (c1 connector). This should be a variable resistor. If you have voltage on the Dk green wire when running but no output, suspect a bad alternator or bad connections going into the alternator. Be cure to test for alternator output on the alternator itself.
WHAT COLOR WIRES MELT TO ALTERNATOR ONE WHITE WIRE BATTERY FEED FUSE LINK WIRE OR THE WHITE AND BLUE WIRE TO VOLTAGE REGULATOR TO COMBINATION METER. WHEN YOU REPLACE ELECTRICAL WIRES BESURE TO PUT FLEXIBLE CONDUIT AROUND WIRES TO KEEP ENGINE HEAT AWAY FROM WIRES AND CONDUIT WILL KEEP WIRES FROM RUBBING CAUSING SHORT TO GROUND.
The orange/light blue wire is connected to the red (positive) wire from the battery, through a fusible link (or two links depending on engine size) to pin #3 of the voltage regulator at the alternator. The fusible link will be in the harness so you may have to disassemble the harness. The fusible link is probably blown. This was probably caused by the defective alternator/regulator assembly.
According to my diagram, it appears to go from the red batt wire to a gray 12 gauge fusible link, into a brown 18 gauge link, then turns into the orange/light blue wire and to the alternator.
(A fusible link is a piece of wire that acts like a fuse and will burn out, opening the circuit when amperage above its rating. This protects the circuit and lessens the chance of fire).
ok we have four connections at the alternator( black wire is ground) (white with blue positive direct from the battery) and two wires connector in the regulator(yellow with black that goes to charge indicator the red light and goes to fuse 7 10a fuse block inside) the blue with yellow goes to fuse 65- 7.5a in the left fron engine comparment fuse box))#1 check for ground at the black wire= #2 check for positive at the white with blue wire (allwas with power) this wire is protected with 100a fuse is in the left front engine comparment fuse box, remenber== check the 100a fuse and the two fuses that protect the regulator. when you turn the ignition switch to the on position power goes to the alternator by the yellow black wire and activate the alternator to work.
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