Alternator Overcharging problem

[Azzkikrcuda]

I am working on upgrading the electrical system on my 70 Cuda. I replaced the stock externally regulated alternator with a new internally regulated nippendenso from an 85 to mid 90s toyota 4runner. The alternator has 4 hook-ups battery, Sense, Lamp and Ignition. I ran a new 8ga battery wire to the battery. Ran a 10ga sense wire to the starter relay terminal. Capped off the lamp wire. Ran a switched 12 wire to the ignition terminal. When I start the car and check voltage I get between 14.9 and 19volts constantly changing. I took it to Napa and had them check the alternator, it put out a steady 14.5 on there machine. I rechecked my wiring it looks ok. Any suggestions would be appreciated.

[MonzaRacer]

There is your problem if I remeber correctly they use a sense wire either from the computer or somewhere in the wiring to control the regulator.
honestly I hate using foriegn car electricals, they just dont like to play nice in non stock applications I personally have been using the CSI GM alternator as they can be set up and ran from the internal regulaot or you cna add in a PCM(if you use a proper computer) to help regulate the contol of the alternator.
Chry co hasnt got a decent latemodel interanl regulated alternator to use.
Good luck

[HILROD]

On most other cars but older Mopars the indicator lamp must be hooked up. Or at least a resistor or diode (can't remember which) placed in line. I have even seen others put a light in line and hide it. Mopars use the amp gauge, but you can't use it with a bigger alt. or it'll burn up.

[Azzkikrcuda]

I bypassed the amp gauge when I installed the new alternator. I might have to try hooking up the lamp circuit.