Also what year car is this, as i believe the 2 wire swap is for 69-71 clusters, and 72 has a different procedure. So if you have a 69-71 car and gauges from a 69-71 then yes the tan and brown get swapped, its very easy, just use a small screwdriver to push down the retaining arms in the plug and pull the wires out. then bend the little arm back up again carefully and reinsert them in the other hole. When its backwards, your gas gauge will act like a volt meter, going up when its running and your gen light will be on brighter or darker depending on your gas level. Let us know if you get it.
P.S. If you are just trying to get this working by plugging it in with the dash out, you need to ground the gauge pod or they wont work at all.
GR-RRR!
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1970 GTO 458 CID .040 over 4 Bolt 428 Block, Forged Eagle 455 Crank, 295 CFM SD KRE D-Ports, SD Old Faithful HR Cam + Comp HR Lifters, PPR Maxx-lite rods, Racetec pistons, PRW 1.65 SS Rockers, 900CFM Holley HP TBI, Performer RPM, Hooker Super Comps, 3" X-Pipe into 2.5" mufflers/tailpipes, 2.75 1st TH400, Continental 13" Converter, 8.5" 3.08 Posi.
Everything installed, fired up and tuning has begun!