MSD 8739 Two Step Module Selector Installation - Manual (Page 3)

INSTALLATION INSTRUCTIONS 3
M S D
• 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
Figure 4 Wiring a Three Step to a Timing Control for Multiple Retards.
PART NO.
AUTOTRONIC CONTROLS CORPORATION
SERIAL NO..
TACH OUTPUT
MAGNETIC
PICKUP
(NOT USED)
WHITE WIRE
TO POINTS OR
AMPLIFIER
IF USED
TO MAGNETIC
PICKUP
TRIGGER
IF USED
YELLOW
BLACK
(NOT USED)
WHITE
RED
GRAY
GRAY
RED
BLUE
SWITCH +12V TO ACTIVATE
SECOND RETARD
SWITCH +12V TO ACTIVATE
THIRD RETARD
FIRST RETARD
IGNITION KEY
+12 VOLTS
WHEN GRAY WIRE
IS GROUND THERE
IS NO RETARD, OPEN
SWITCH TO RETARD.
BLACK
TO GROUND
WHITE
TIMING COMPUTER
PN 8980
PN 8737
BLACK
FIRST
RETARD
THIRD
RETARD
SECOND
RETARD
ORANGE
RED
BLACK
COIL
IGNITIO
N
TM
Multiple
Spark
Discharge
MODULE 2 MODULE 1
PN 8737
MODULE SELECTOR
3
M O D U L E 3
AUTOTRONIC CONTROLS CORPORATION 1490 HENRY BRENNAN DR, EL PASO, TX 79936
TM
+
HEAVY RED
HEAVY BLACK
TO BATTERY
TO BATTERY
+
Figure 5 Wiring a Three Step to a Shift Light for Multiple Shift Points.
SHIFT LIGHT
BLACK
TO GROUND
RED
GREEN
TO SWITCHED
12 VOLTS
TO
TACH OUTPUT
RED
BLUE
SWITCH +12V TO ACTIVATE
SECOND SHIFT POINT
SWITCH +12V TO ACTIVATE
THIRD SHIFT POINT
PN 8737
BLACK
FIRST
SHIFT POINT
THIRD
SHIFT POINT
SECOND
SHIFT POINT
MODULE 2 MODULE 1
PN 8737
MODULE SELECTOR
3
M
O
D
U
L
E
3
AUTOTRONIC CONTROLS CORPORATION
1490 HENRY BRENNAN DR, EL PASO, TX 79936
TM