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PN6421 Datasheet(PDF) 4 Page - Mallory performance club |
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PN6421 Datasheet(HTML) 4 Page - Mallory performance club |
4 / 28 page 4 INSTALLATION INSTRUCTIONS MSD • W W W. M S D PE R F OR M A NC E . C OM • ( 91 5 ) 8 55 - 7 12 3 • F AX ( 91 5 ) 8 57 - 33 4 4 WIRING GENERAL WIRING INFORMATION Wire Length: All of the wires of the MSD Ignition may be shortened as long as quality connectors are used or soldered in place. To lengthen the wires, use one size bigger gauge wire (12 gauge for the power leads and 16 gauge for the other wires) with the proper connections. All connections must be soldered and sealed. These are the two heavy 14 gauge wires and are responsible for getting direct battery voltage to the ignition. The Ignition is load protected from reverse battery connections and will automatically shut down if there is over 28 volts input. This wire connects directly to the battery positive (+) terminal or a positive battery junction such as the starter solenoid. Note: Do not connect to the alternator. This wire connects to a good ground, either at the battery negative (-) terminal or to the engine. Power Leads Heavy Red Heavy Black Accessories Blue Gray Red Orange Black Trigger Wires White White/Blue Violet and Green (Magnetic Pickup Connector) This wire is responsible for turning the MSD On and Off. Connects to a switched 12 volt source such as the ignition key or switch. This wire connects to the coil positive (+) terminal. This is the ONLY wire that makes electrical contact with the positive coil terminal. This wire connects to the coil negative (-) terminal. This is the ONLY wire that makes electrical contact with the negative coil terminal. There are three circuits that can be used to trigger the MSD Ignition; a Points circuit (the White wire), a Magnetic Pickup circuit (the Green and Violet wires), and a Hall-effect wire (White/Blue). Only one circuit will be used at a time. This wire is used to connect to breaker points, electronic ignition amplifier output or to the Yellow wire of an MSD Timing Accessory. When this wire is used, the White/Blue wire and Magnetic Pickup connector are not used. Hall-effect Trigger. This wire connects to the trigger wire of a Hall- effect pickup. When used, the White and Magnetic Pickup wires are not used. These wires are routed together in one harness as the magnetic pickup connector. The connector plugs directly into an MSD distributor or crank trigger. It will also connect to aftermarket pickups. The Violet wire is positive (+) and the Green wire is negative (-). When these wires are used, the White or White/Blue wires are not. This wire activates the Two Step Rev Control. When 12 volts is applied to this wire, the low rpm limit is activated. When 12 volts is removed, the rev limit returns to the high limit. Tach output wire. Connects to the tachometer trigger wire or other rpm activated device. |
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