The temp sensor of a basic pre computerised temp gauge mostly just has a single wire and when a gauge doesnt work it can be tested by grounding that wire which then should result in a full scale reading from the gauge. Wire connect the black wire to a clean rustpaint free engine ground.

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Saas exhaust temp gauge wiring diagram. If it doesnt the supply gauge or wiring is at fault. Saas has long been supplying the automotive aftermarket with a wide range of performance gauges. Installing a water temp gauge triple john cooper sportspack clocks jcw works classic mini duration. Wire connect the red wire to a switched 12v source. Connect the terminal to red thermocouple extension. Connect the s terminal to yellow thermocouple extension wire.
Souside retrospec 1033 views. How install and wire up saas volts gauge and temp gauge in 4runner duration. Exhaust temp gauge wiring figure 2. Disconnect negative battery cable. This is for a sub who wants to know about the saas gauges wiringi hope it helps. From the latest in dash mounted speedo and tacho to dual reading gauges perfect for that 4wd fit out even carling type gauges that mount in your spare switch panel slots.
You would need to study the wiring diagram to answer your final question. Installation and troubleshooting guide trax by saas oil pressure 140 psi and water temp 40 120 deg gauges sg614050 trax by saas exhaust tempvolts install guide installation and troubleshooting guide trax by saas exhaust temp 0 900 deg and volts 8v 18v gauges. Dominic geering 3887.