Guest Posted November 28, 2015 Share Posted November 28, 2015 Hi guys, Does anyone know how the warning light circuit on a TD5 works? Is it triggered from an open loop or negative switched? Also where does the wiring route to the ecu or dash? My warning light stays on, I thought it was a faulty switch but that appears to be working, I have however noticed that when I rev the truck the light will flicker and go off for a few seconds so am figuring it must be a loose connection somewhere.. Jason Quote Link to comment Share on other sites More sharing options...
dave88sw Posted November 28, 2015 Share Posted November 28, 2015 It's a switched earth. Most common place for a short is where the loom passes over the top of the transfer box or where the single wire passes through the seat box (often the grommet is found floating along the wire and the wire has rubbed through against the hole). Do check your brake fluid level though, i think i'm right in saying that the light doubles up as the low fluid warning. Quote Link to comment Share on other sites More sharing options...
western Posted November 28, 2015 Share Posted November 28, 2015 yes double use -- park brake on or low brake fluid level, switch is under the park brake rubber boot. Quote Link to comment Share on other sites More sharing options...
Glue Posted November 28, 2015 Share Posted November 28, 2015 I had a similar issue on my '99 110, which I eventually traced to a non floating float switch on the top of the brake fluid reservoir. Quote Link to comment Share on other sites More sharing options...
Guest Posted November 29, 2015 Share Posted November 29, 2015 Thanks guys, It was a stuck float switch, I would have never of even thought of that! Jason Quote Link to comment Share on other sites More sharing options...
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