4 wire ac delco alternator harness dont know whats what.
My friend has a mid 70s C10 pick-up and put in a creat engine his old engine only had 2 wires this harness on the alternator has 4 what to do cant figure witch one is for charge and witch is for batt light
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WOW? yes, the new ECU;PCM uses a real electronic 3 wire hall sensor for speed, (or uses ABS if opted) swaps are complex. we need what you had before the swap (drive line) and what was removed from the 2003... every part.
Not sure what engine this is but mid 70s is right up this old grandpas street but i would need to see it to know what to do as the idle control ?? this is a puzzle as not sure what this is or how its working but it could be turning off the autochoke ??Dont have a pen thingy for the computer or i could soon sketch the alternator wiring from memory ,it will have a soloniod for the alternator that works from the ignition to energise the alternator then a built in diode pack in the alternator and a external regulator with 3 wires to it ,the feed from the alternator which is a neg then the exciter which is the middle one which is 12v pos and the output which goes to ground ,depending on the system of course as the lucas was a bit different to the bosch but this idle thing is bothering me as i cannot place it but the starter isolator was a common thing to stop the vehicle from being stolen ,normally they were hidden under the seat or the dash ,sometimes they were in the trunk to confuse people .But this is a simple thing to sort out just a question of getting the original alternator wiring diagram .
We usd to rebuild alternators and we would build some of the old style 10SI Delcos with a self-exciting regulator just for this type situation. All you have to do is connect the battery wire to the stud on the alternator and you were good to go. If you can't find anything local Google "1 wire delco alternator" and you'll come up with all kinds of places to buy them. If you want a regular 3 wire they are easy to wire also. You'll need to buy a regulator plug. The regulator terminals are labeled #1 and #2. #1 is wire to a switched ignition source and #2 can be connected to the battery stud on the alternator along with the battery wire.
Hi, this is a 2 wire Delco alternator. The wire from the terminal on the back goes to the battery or starter, and the other (excite) wire goes to the battery light in the dash. It also goes to the PCM--not sure which pin, sorry.
The 10 gauge red goes to the stud on the back of the alternator, the brown and the red or gray (depending on the wiring) go to the regulator. What colour are your wires? Also, what kind of alternator are you putting back in? The old style with the square white connector, or the new style with a funny-looking square connector? (Remember, the 10 gauge wire connects to the stud, and out of the other 2 wires, one turns on the regulator and the other one turns off the charge light on the dash. The old style alternator is marked L for light and R for regulator.) Headlights? Different animal altogether.
If you ask for a one wire delco alternator,all you have to do is connect the large wire on back of the alternator to the positive battery post on the battery.The alternator is self energizing,there for no problem with wiring up a harness.If I can help,let me know my name is Ron.>>>email@example.com
1. Disconnect the battery
2 Loosen botls so you can remove the drive belt to alternator.
3. If it has a serpertine belt, then pry with proper tool on the tensioner to remove the belt.
4. Disconnect harness to alternator and ground wire if any and filter condenser if any.
5. Loosen bolts to alternator and remove alternator.
6. If AC equipped, not knowing your belt configuration would require to loosen the AC Belt also, depending if your alternator belts is the first one near the engine, then all belts have to be loosen to remove it. unless #3 applies.
Reverse the steps to put it back on.