<VV> Press/Temp Light Not On

[Greg Shaw]

With the key in the on position my 61 Rampside with manual trans and 95 HP engine has only the Gen/Fan light on. The Press/Temp light is not lit. I have continuity from the Press/Temp bulb socket tan wire to the ignition and from the blue wire back to the sending unit wire in the rear. If I ground the temp and press wire before the split the Press/Temp light will light. Are the oil pressure and cylinder temp senders supposed to be closed initially to complete the circuit? Why is the bulb not lit in the ignition ON position? I don't know if this matters, but I do have the engine/wiring updated with a self regulated alternator. I did not see anything in that conversion mentioning any effects to the dummy lights. Thanks in advance.
Greg ShawPinckney, MI