User's Guide

Teletrac, Inc. - Prism TM Information and Installation Guide
1622-0300 B1 3/18/04 33
5. Connect the PRISM TM wiring harness as recommended below. For safety, remove fuse
until installation is complete. Never tap into existing power or ignition wires used from other
aftermarket devices.
Ground – Locate chassis ground within one (1) foot of the PRISM TM
placement. If chassis
has sound absorbent materials, scrape materials and/or paint until you reach clean metallic
surface. Always use a star washer when attaching to chassis ground.
Run Constant +12 Volt Wire – Attach one end of the fuse holder to determined power
source. Recommended locations are the starter solenoid, main +12 volt terminal behind fuse
box or battery distribution block in ending compartment / behind dash. Never use the existing
factory wires that are attached to ground, this could cause interference.
Run Ignition Wire – Attach one end of fuse holder to determined +12 volt switched ignition
source that will rest at ground (verify with suitable Multimeter). Recommended locations are
behind ignition cylinder, behind fuse box or the starter solenoid in the engine compartment.
Never use the existing factory wires attached to ground, this could cause interference.
TIP: Using a voltmeter, make sure that the Voltage on the line you are connecting to does not
drop to zero while the engine is started (Cranking). This line will be referred to as “True Ignition”.
6. Mount the PRISM TM to the chassis of the vehicle utilizing the mounting tabs. Secure the
unit with four (4) self-tapping machine screws.
7. Zip tie excess wire slack and zip tie around the fuse
holder to prevent tampering.
8. Attach PRISM wiring harness to the PRISM TM.
9. Connect GPRS and GPS connectors to the PRISM
TM. Attach the main power and/or replace the fuse.
10. Attach accessories as necessary:
MDT – Determine placement within 10 feet of the
PRISM TM placement. Run a serial cable to the
unit. Be sure to get placement approval from the
customer.
Ignition On/Off Messaging – see schematic for
relay placement.
PTO On/Off Messaging – see schematic for relay
placement.
11. Attach laptop and perform a local installation
checkout.
12. Reinstall all vehicle panels.
13. Clean up any debris within your work area.
14. Complete the work order form, including the vehicle
license plate number, VIN, installation test results
and the PRISM TM IP sticker.
85 - Ignition
Sense
86 - Ground
30
87
Ground
Normally Open
Normally Closed
87A
Ignition Input
Orange
85 - Active High
Input Sense
86 - Ground
30
87
Constant +12V
Normally Open
Normally Closed
87A
Sample Input 1
Blue
Constant +12V
Ground