External Voltage Regulator
#1
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New to the forum. I used search function and did not find this addressed anywhere. I apologize if this has been brought up before.
Long story short - Got a bad voltage regulator on a 2000 Grand Caravan 3.3L. Don't want to pay to replace the PCM just to keep a ten year car running a couple more years, so I bought an external voltage regulator kit. Hooked it up to the field leads of the alternator, but can't find a good ignition wire for keyed power under the hood.
What I've tried:
1. The unit works. When I hold the power wire to the positive terminal on the battery and start it, the multimeter shows 14V, so the battery is getting a good charge from the alternator. Obviously I need to find a good keyed ignition wire for power.
2. On the right side of the fire wall, there is a plug with several wires which get keyed power. I've tried each of these, but they mess things up. When the voltage regulator is connected to these and the car is started, the multimeter on the battery spikes up to 16V and the lights/radio in the car pulsate.
What I need is the physical location of an ignition wire under the hood that would be a good place to splice in the power for the voltage regulator. I'm also consulting wiring diagrams, but to be honest, I suck at reading them. Even when I find a wire on the diagram, finding the physical location on the vehicle is sometimes difficult.
Long story short - Got a bad voltage regulator on a 2000 Grand Caravan 3.3L. Don't want to pay to replace the PCM just to keep a ten year car running a couple more years, so I bought an external voltage regulator kit. Hooked it up to the field leads of the alternator, but can't find a good ignition wire for keyed power under the hood.
What I've tried:
1. The unit works. When I hold the power wire to the positive terminal on the battery and start it, the multimeter shows 14V, so the battery is getting a good charge from the alternator. Obviously I need to find a good keyed ignition wire for power.
2. On the right side of the fire wall, there is a plug with several wires which get keyed power. I've tried each of these, but they mess things up. When the voltage regulator is connected to these and the car is started, the multimeter on the battery spikes up to 16V and the lights/radio in the car pulsate.
What I need is the physical location of an ignition wire under the hood that would be a good place to splice in the power for the voltage regulator. I'm also consulting wiring diagrams, but to be honest, I suck at reading them. Even when I find a wire on the diagram, finding the physical location on the vehicle is sometimes difficult.
#3
#5
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can anyone send me a wiring diagram on how to hook up and external voltage regulator on a 91 Dodge Ramcharger I'm a little confused on the sites that I've been on I was hooking up the two wires to the back of the alternator what do you do with the one large wire the once I told me to tape it up that is not what is that the wirethat runs from the battery to the alternator?
#7
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Master Tech,
Isn't the dark green/orange wire at the alternator switched battery voltage from the ASD relay? As I understand it, you have full batt voltage at alt any time key is in RUN and the dark green wire to PCM is a pulsed ground to regulate field strength depending on battery temp sensor and load calculations by the PCM.
Isn't the dark green/orange wire at the alternator switched battery voltage from the ASD relay? As I understand it, you have full batt voltage at alt any time key is in RUN and the dark green wire to PCM is a pulsed ground to regulate field strength depending on battery temp sensor and load calculations by the PCM.
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