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Physical Location of Probe Connectors

The connectors for the temp probes, does it matter if they are ahead of or behind the firewall?  Several of them are not long enough to be behind the firewall, so I was going to put them all ahead of the firewall.

The 200 Series instruments have the thermocouple "cold junction" inside the 25-pin (DB25) harness connector on the instrument side. We run thermocouple wire from the probe tip to the instrument head (the brown wires) and include "matched metal" connectors for near zero loss. Thus it does not matter where you place the connectors (before or after the firewall).

As a recommendation, inside the engine compartment is always easier as, in the event that you have to replace a probe ... no wire routing, but that's a matter of preference.
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