LETRIPP II XMS4A DIY MANUAL V2.1
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PE
RFECT POWER XMS4A – Engine Management System DIY MANUAL V2.1
16.
TYPICAL DEVICES DRIVEN BY THE XMS4A
This section explains how to wire the devices used by the engine but driven by the XMS4A.
16.1
BOOST SOLENOID
This solenoid is used on turbo charged engines to regulate the boost electronically. Any
auxiliary output can be used provided there is one spare.
To manifold
To wastgate
To atmosphere
XMS4
Auxillary
connector
5 Amp
+12 Volts switch power
16.2
FUEL PUMP RELAY
For safety reasons the XMS4A must control the fuel pump relay. The XMS4A will switch the
fuel pump off if the RPM input stops. The fuel pump relay is connected to the XMS4A’s
auxiliary connector.
30
87
85
86
Side View
Bottom View
Pin 85 and 86 = Coil
Pin 30 and 87 = Relay Switch
30
87
85
86
+12 Volts Switch Power
Positive Battery
Device Power eg: Fuel pump
Fuse
Fuse
Example of a 4 Pin Relay
XMS4 auxillary output