Installing Aftermarket Gauges

In Vehicles that transmit sensor data over CAN

canbus.com.au

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Method 1: Tee into existing sensor line

1. Plan the Job first. In this example I fitted a dual aftermarket Oil Pressure/Water Temp gauge, the manufacturer instructions specify to install extra sensors for this gauge to function. As my vehicle already has a coolant temperature sensor and an oil pressure sensor, and I am lazy, I am going to tee into the existing wiring to get my signals for the gauge.

2. I see where the sensors and their wiring are located on the engine. In my case next to the oil filter, and and the front of block:
   Engine Coolant Temperature Sensor:
   
   Engine Oil Pressure Sensor:
   

3. Soldering the wires and making the harness:

4. Testing the Gauge:

5: Running Power and Illumination to the Gauge:

6: Finished:

Method 2: Build an CAN to gauge signal adaptor with a raspberry pi

In my vehicle, the sensors that are on the engine are wired only to the PCM, and the Gauges on the Instrument Cluster receive data via CAN. The aftermarket gauge is an electronic gauge that reads analogue signals, and the point of CAN is to reduce unnecessary wiring.

Method 3: Install Aftermarket Sensor

Generic Engine Diagram

W.I.P MAY21