Quote:
Originally Posted by bigd65
Its very possible this cluster was changed because there has not been anything right on this truck yet.
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Yes it has.
Quote:
Originally Posted by bigd65
I don't have a tan wire for the oil sender just the blue, The diagram I have show two different dark blues, one for choke heater (i think) and one for oil pressure sender.
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OK. Knowing what colors you're working with I'd guess you are finishing an incomplete conversion from Telltales (idiot lights) to gauges on a 81-87 truck. The Idiot lamp harness colors differ from the gauge harness colors and the idiot lamp plug is pinned completely different.
You need to verify each pin on your instrument panel plug. Verify every wire position against the tables below. Circuits 8, 11, and 30 are in the same position on both plugs everything else is suspect.
IDIOT LIGHT (TELLTALE) INSTRUMENT PLUG WIRE COLORS
CKT...DESCRIPTION.........WIRE COLOR
8......Cluster Lamps.........GRAY
11.....High Beam Lamp.....LIGHT GREEN
14.....Left Turn..............LIGHT BLUE
15.....Right Turn.............DARK BLUE
25.....ALT Field..............BROWN (not used on gauge panel)
30.....Fuel Gauge............TAN (PINK 77-80)
31.....Oil Sender.............DARK BLUE
33.....Brake Lamp...........TAN/WHITE
35.....Temp Sender.........DARK GREEN
39.....Ignition Power.......PINK (PINK/BLACK 77-80)
50.....IGN Generator........BROWN to Blower Switch(not used on gauge panel)
150...Grounds................BLACK
237...Seat Belt Warning...PINK/WHITE (YELLOW 77-80)
931...Electric Choke........DARK BLUE
939...IGN Generator........ORANGE to Blower Switch (not used on gauge panel)
1977-1987 GAUGE Plug Pinout by Circuit #s
150........35
14.........150
15..........30
237........39
-----......31
931........39
39..........150
33..........8
30..........11
73-87 IDIOT (Telltale) Panel Plug Pinout
14........150
15........33
39........25
-----....50/939
-----....39
150......35
237......31
----.....8
30.......11
TAN, LIGHT GREEN, and GRAY should orient the plug for you because they are not moving. You'll be missing a ground and ignition lead for the Volt Gauge.
Circuit 50/939 will probably sub for the missing circuit 39 ignition lead.
I'd stub off the brown wire from Circuit 25 @ 3" from the plug leaving enough of both pieces to connect them to additional wire.
At the plug solder on black wire long enough to reach a good ground this will give you the missing Circuit 150 for the plug.
The stub coming from the harness should be Circuit 25 from terminal L on the Delco SI alternator. You need to hook this to an ignition source with an inline resistor... Google "alternator resistance wire".
The Pinouts came from
http://www.73-87chevytrucks.com/tech...rument_pg1.jpg. Id print the JPG I linked to and the wire-color circuit tables from this message.
Quote:
Originally Posted by bigd65
The temp (green ) it pegs when I hook it up to the temp sender. ( might be bad sender but is new )
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If this is still a problem with all the wires in the right slots of the panel plug check the resistance from the tang to the threads on the sender. If it's a dead short with the engine cold you probably have a glowplug inhibit sender.
Quote:
Originally Posted by bigd65
Sorry about the Junction block, was just worried, seems like it should be fused.
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It's the main power junction block. It's actually fused with a high amperage Fusible Link wire at the starter.