[T2] Turn signals/emergency flashers 1971 bus..........Also, the oil pressure light

[T2] Turn signals/emergency flashers 1971 bus..........Also, the oil pressure light

Bob Pratt ka1dza at verizon.net
Wed Oct 12 15:26:25 PDT 2016


Hi Jamie,
The bulb is good. I'll check the rest this weekend. As always, thanks for your continued patience.

Bob

> On Oct 11, 2016, at 10:18 PM, Jamie <jrivers at globalserve.net> wrote:
> 
> Bob ,, if you are sure you followed the instructions below.. then there is one more step..
> put a test light, or a voltmeter on the dash light track where the oil light is plugged into.....
> one side will be ground .. and the other side will be live when the key is on.
> 
> the gounded side won't work unless you have the wire at the oil pressure switch grounded..
> 
> and one other thing to check... is there a lamp in the holder? and is it good?
> 
> 
> 
> From: "Bob Pratt"
>> Also, the oil pressure light does not work. I've changed the switch and made sure the blue/green wire was not broken. Does anyone have any suggestions on what to do next?
> 
> 
> Bob,, the oil pressure light is the simplest circuit on the bus.. so .. go
> to the oil pressure switch,, remove the wire.. and attach it to ground so it
> stays there.. like with an aligator .. make sure it is grounded.
> 
> then go to the front of the bus.. and find the blue green wire near the dash
> lamp for the oil pressure indicator
> 
> attach your test light clip to a hot fuse.. touch the test light probe to
> ground,, light comes on... you have a good hot ,, and a good ground,,
> 
> now , touch the test light probe to the blue green wire..... you might have
> to poke a tiny hole in the blue green wire insulation.... or go right to the
> lampholder on the dash...
> 
> you should get the test lamp to light as your have grounded that wire at the
> engine..
> 
> if the test light doesn't light,, then you have a broken wire,, or a poor
> ground at the engine,,
> 
> or,,,,,,,, there is a 6 terminal block where the blue green wire connects
> thru... I don't know where it is located on a 71,, but it should be near the
> dash,, maybe under the fuse panel,, just before the wiring exits the cab and
> goes under the bus..
> 
> that 6 terminal connector also has left brake /  rear turn signal,,, starter
> solenoid ,,,, fuel gauge ,,,  generator dash light ,,, and another part of
> the rear brake light circuit thru the equalize switch
> are  you having trouble with any of those 6 ?
> 
> IF the test light comes on,, turn on the key and see if the dash oil
> pressure lamp turns on........... no love?  check the ground on the dash
> with your test light.. it is still connected to that hot fuse ,, and the tip
> connects to the ground circuit on the gauge cluster ... no love? you need a
> ground jumper from the body to the instrument cluster... if it does
> light....... check the lamp is good...
> 
> put your test light from the blue green wire.. and touch the instrument
> cluster ground.. if the test light comes on.. then you have a problem right
> at the dash lamp holder,, or lamp itself..
> 
> hope that helps
> Jamie
> 



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