MSD 62153 DIS-4 Plus High Output Installation - Manual (Page 5)

INSTALLATION INSTRUCTIONS 5
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• W W W . M S D P E R F O R M A N C E . C O M • ( 9 1 5 ) 8 5 7 - 5 2 0 0 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4
NOTE: The factory rev limiter and all timing functions will still
function as normal with the MSD Digital DIS-Ignition
installed.
1. Locate the ignition coils and identify which wire leading to the
coil(s) has 12 volts on it with the ignition key in the On position.
If available, refer to the vehicle's service manual wiring diagram
to assist you in identifying the 12 volt wire(s).
NOTE: On some vehicles the starter must be engaged to provide
+12 volts to the positive wire leading to the coils. If none
of the wires indicate 12 volts, have someone engage the
starter while testing each of the wires.
If a service manual is not available, follow this procedure
A. Disconnect all wires leading to the coil(s). NOTE: On some applications it may require that the
harness leading to the coil be cut to access the wires.
B. Turn the ignition switch On. Using a voltmeter, probe each of the wires on the harness to
determine which wire has 12 volts on it. NOTE: Make sure the wires do not contact any engine
components.
C. The wire that shows 12 volts is the positive feed to the coil. Turn the ignition switch Off and
connect the DIS Red wires to the harness and the DIS Brown/Orange wires to the positive (+)
side of the coil.
D. The remaining wires on the harness are the trigger wires. On a 4-cylinder you should have two,
on a 6-cylinder three, and on a 8-cylinder there should be four. Each of these wires needs to be
connected to one of the trigger input wires of the DIS Ignition. Using Figure 3 and 4 as a guide,
connect the DIS trigger input and coil (-) wires as follows.
1. Connect the DIS White wire, Channel 1, to the first factory trigger wire and then connect the DIS
Brown/White Coil (-) wire to the corresponding wire on the coil.
2. Connect the DIS Green wire, Channel 2, to the second factory trigger wire and then connect the
DIS Brown/Green Coil (-) wire to the corresponding wire on the coil.
3. Connect the DIS Yellow wire, Channel 3, (available on the DIS-4 only) to the third factory trigger
wire and then connect the DIS Brown/Yellow Coil (-) wire to the corresponding wire on the coil.
4. Connect the DIS Violet wire, Channel 4, (available on the DIS-4 only) to the fourth factory trigger
wire and then connect the DIS Brown/Violet Coil (-) wire to the corresponding wire on the coil.
IMPORTANT: If you are using the DIS-4 HO on a 4 or 6-cylinder application where all the DIS channels
are not used, you must ground the unused trigger input wires. On a 6-cylinder application,
ground the DIS Violet wire and on a 4-cylinder, ground the DIS Violet and Yellow wires.
At this point all the DIS harness wires should be connected. Review your wiring and make any
corrections if required. To verify that all wires are connected to their proper locations, plug the supplied
bypass plug into the DIS harness and then start the vehicle. If the vehicle does not start then the
harness was not installed properly. Check all your connections to ensure that they are secure and
connected in the proper order. The only wires that should be connected directly to the coil are the
BRN/ORG, BRN/WHT, BRN/GRN, BRN/YEL and the BRN/VIO. Do not hook any other wires to the coil.
The Red wires should be connected to a switched 12 volt source, allowing the ignition to be switched
On and Off by the vehicles ignition switch.
In most applications, when the vehicle starts, that indicates that the harness is correctly installed.
Connect the DIS heavy Red wire to the positive (+) battery terminal and the heavy Black wire to the
negative (-) battery terminal. Remove the bypass plug from the harness and plug the DIS Ignition
into the harness. Start the vehicle to verifiy that all functions are operating.
Figure 2 Locating 12 Volts at the coil.
WIRING