XS Power XSP310-311 Controller and Harness for GM "CS" Series Alternators (1986 to 1997), Red Display
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What's Inside?
- • Controller and Harness
- • Owner's Manual
Controller & Harness for GM SI Alternators
Bring precise voltage management to classic GM charging systems with the XS Power XSP310-311. Designed for GM “SI” Series alternators from 1969–1988, this controller and harness combination supports multiple system voltages while providing programmed adjustment limits for a controlled electrical setup.
Frequently Asked Questions (FAQ)
- • Why does my XSP310-311 voltage keep changing?
Users have reported voltage moving up and down instead of staying at the selected setting. Checking the VCM, alternator, and wiring is a good starting point.
- • Why won't my VCM increase alternator output?
A user reported the VCM initially staying around 12.7–12.9V and not responding to adjustments. This can indicate a controller or alternator issue.
- • Can the XSP310-311 go above 15.2 volts?
The 12V setting has a programmed 15.2V limit, but XS Power says 12V batteries should never exceed 14.9V.
- • Why did my electronics start switching on and off?
One VCM user reported aftermarket electronics repeatedly cycling when the charging voltage became excessively high.
- • How do I avoid choosing the wrong VCM harness?
Check the alternator connector first. XS Power states that VCM kits are application-specific and determined by the alternator plug.
- • Will XSP310-311 work with a one-wire alternator?
No. XS Power's application guide specifically lists aftermarket one-wire SI alternators as incompatible with the VCM.
- • Why does my voltage spike when the audio load changes?
A real user reported voltage spikes when the bass load dropped, sometimes sending equipment into protection.
- • Can I use this VCM for a 14V or 16V setup?
Yes. The XSP310-311 supports 12V, 14V, and 16V systems, with higher-voltage configurations allowing up to 19.5V.
- • Why did my alternator stop charging after installing the VCM?
A user reported an alternator shutting off when the VCM was connected. If this happens, the VCM and alternator compatibility should be checked before continuing to operate the vehicle.
- • Does XSP310-311 work with both factory and aftermarket alternators?
Yes, when the alternator is a compatible regulated type. XS Power lists compatibility with stock and aftermarket alternators.
Features:
- Classic GM Compatibility: Designed for 1969–1988 GM “SI” Series alternators.
- VCM Control System: Combines the controller and application-specific harness.
- 10–20V Operation: Supports a broad range of charging applications.
- 12V Configuration: Adjustable from 14.2V to 15.2V.
- 14V/16V Configuration: Adjustable from 14.2V to 19.5V.
- Dip-Switch Selection: Configure the VCM for your chosen system voltage.
- Performance-Oriented Design: Ideal for upgraded and custom GM electrical systems.
- UPC: 692209015239
- Weight: 10
- Authorized Internet Dealer
Warranty: 2 Year(s) Warranty.
This item is accompanied by a manufacturer's warranty. If it is found to be defective, it may be returned to OnlineCarstereo.com for replacement within 2 Year(s) from the original date of purchase with proper return authorization.
