superdog405 Posted April 9, 2017 Share Posted April 9, 2017 Changing speedo head in my '87 superliner over to elec., using a speedo head from a late '90s Le,Mr, Rd etc.. They have 6 wires coming out of the plug. I would assume that 2 go to sending unit ,2 to an ecm (that I don't have) and a power and ground . My question is, if I'm only using 4 wires, witch 4 are they ? Thanks 1 Quote Link to comment https://www.bigmacktrucks.com/topic/49465-manual-to-electrionic-speedo/ Share on other sites More sharing options...
AZB755V8 Posted May 15, 2017 Share Posted May 15, 2017 I cant help with the wiring but did convert my Superliner Speedo to GPS. It is a lot simpler than anything else. Hook up antenna , power and it works. No sensors or wiring to figure out. AutoMeter or Speed Hut both make GPS Speedo's. You can get an exact dial face match to the mechanical Speedo (or any face you want) from Speed Hut. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/49465-manual-to-electrionic-speedo/#findComment-369838 Share on other sites More sharing options...
Mackpro Posted May 15, 2017 Share Posted May 15, 2017 Speedometer older models.pdf Quote Link to comment https://www.bigmacktrucks.com/topic/49465-manual-to-electrionic-speedo/#findComment-369864 Share on other sites More sharing options...
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