Am replacing the starter on my old 1989 GMC sierra truck. The old starter had only one little terminal screw .This new replacement starter has two small terminal screws a "S" and an "I" which terminal do I use to reattach the wire.
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TURN OFF RADIO FIRST TO KEEP FROM LOCKING IT OUT WHEN YOU DISCONNECT NEGATIVE BATTERY CABLE. SOUND LIKE WEAK BATTERY OR STARTER MAKE SURE BATTERY CABLES CLEAN AND TIGHT.IF BATTERY GOOD REPLACE BATTERY CABLES.CHECK STARTER MAKE SURE STARTER SOLENOID AND STARTER OKAY.YOU CAN HAVE THEM TESTED AT AUTO PARTS STORE OR USE A REMOTE SWITCH.REMOVE STARTER FROM VECHICLE USE JUMPER CABLES.HOOK NEGATIVE GROUND CABLE TO BATTERY NEGATIVE THEN GROUND STARTER BODY WITH NEGATIVE BATTERY JUMPER CABLES HOOK POSITIVE JUMPER CABLE TO BATTERY POSITIVE AND STARTER POSITIVE TERMINAL.THEN HOOK REMOTE SWITCH TO STARTER STARTER SWITCH AND OTHER REMOTE WIRE TO STARTER POSITIVE TERMINAL.PRESS REMOTE STARTER WILL SPIN IF GOOD.MAKE SURE INJECTION PUMP STATIC AND DYNAMIC IS TIMING CORRECT BEFORE STARTING TRUCK.
If your starter has 2 or more small wires on it you may have switched the terminals. If you have a separate starter relay you can bypass the relay with a jumper cable and send 12 volts to the starters only main cable. It should crank, have it in Park (Auto) or Neutral (stick shift). If the starter does not crank bypassed then the only thing missing is a good ground. Use a pair of jumper cables and try grounding the starter case and connect the cable to a good ground. With the gauges dancing usually a bad ground is the reason, so the jumper cables will help with that problem too, at least for test reasons.
If you had the old starter tested, then you know it was the first problem. But if the old starter was not tested your problem could be a bad starter relay, an ignition switch,or finally a bad ground. Check the grounding of the remote starter relay, check for a plug-in connector off the end of the steering column for corrosion.
Well you can please follow the below steps - 1. Park your GMC Sierra on a level surface, activate the emergency brake and place blocks behind the back tires for safety. Disconnect the negative battery cable with a terminal puller. Raise the front end of the truck with a jack for easier access to the starter. 2. Remove the right front wheel, right front fender splash shield and turbocharger exhaust pipe from your GMC Sierra. 3. Unscrew the starter mounting bolts and place them in the jar to prevent loss, because you will need them later. Remove the malfunctioning starter from its position next to the engine. 4. Disconnect solenoid terminal wires and electrical connections from the starter. Remove the heat shield and bracket from the starter to use on the new one, placing bolts in the jar. Your malfunctioning starter should now be clear of the vehicle. 5. Take your malfunctioning starter to the parts store with you. After-market distributors re-manufacture most of the starters they sell, so you can likely obtain a partial credit toward your new starter by exchanging your old one. Be sure that you take care not to damage the starter in transit, because the better condition it is in, the more you can get for it. 6. Purchase a replacement starter that has the same or higher cranking capacity (power rating) as the original starter in your GMC Sierra. Also, match the bolt patterns, drive gears and electrical connections. Your owner's manual may list specifications or the auto parts technician will help you determine them. Please post comments for further help or information.......
Did you check your ground wire?If ground is good check to make sure your solenoid wire which is purple usually if it is broke if not get a test light and have someone turn motor over to crank position and check if power there if so more than likely ground problem.If solenoid has no power move to fuses under drivers dash..