When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I'm putting a new alternator on my 1972 F250. Went to the parts store and was given an alternator that has 4 connections. I'll show you in the first picture. On the second picture is all of the connections on the alternator in the parts store to verify it was good. Now the last picture is the connector that I have in the truck. This doesn't seem right. I see 3 connection points on this alternator harness. Do I need a different alternator or different connectors on the harness?
Do you have an AMP METER in the instrument cluster?
There's 2 different wiring diagram, depending on charge light or AMP METER.
In both cases, you will need a wire on the field terminal on the alternator.
Do you need the Stator output on the alternator for an electric choke? The auto parts store did test the Stator output, but only you know if you really have a need for it.
My guess is that you have an AMP METER.
Short answer is you are over thinking it. Connect the Field wire and start it up.
In the over thinking it category, some folks like a extra ground wire, from the alternator ground stud to one of the hold down bolts for the voltage regulator. Extra grounds are always a good thing, especially on old rusty trucks.
If you only have 2 wires going to the alternator, the larger one is connected to the output (BAT).
The smaller one would go to the field, (FLD) with the white insulator.
Did the clamp point, shown in your photo, connect to the ground lug in your last alternator installation?
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Slideshow: The VelociRaptor Expedition gains a lift, upgraded suspension, Brembo brakes, and trail-ready equipment while retaining the stock 440-horsepower EcoBoost V6.
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.
