08-11-2005, 09:31 PM | #1 |
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Speedo
Please help. Have a 91 chevy 1500, speedo doesn't work does anyone on this forum have any ideas. Posted on 88-98 forum but no replies. Thanks.
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1986 Silverado Short box fleet side. project 2005 VW Tiguan 4 Motion 1997 Blazer S10 4x4 1990 Chevy Silverado K1500 Extended long box |
08-11-2005, 11:11 PM | #2 |
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Check to make sure that your speedo is getting power, and also check to make sure that there is something of a signal coming from your DRAC (the little yellow box somewhere nearby your ECM, it converts the 40 pulse per driveshaft revolution signal coming from your tranny into the 4 pulse per speedometer cable revolution signal that your speedometer wants)
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1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap) |
08-11-2005, 11:45 PM | #3 |
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Thanks. WIll give it a try.
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1986 Silverado Short box fleet side. project 2005 VW Tiguan 4 Motion 1997 Blazer S10 4x4 1990 Chevy Silverado K1500 Extended long box |
08-12-2005, 02:40 AM | #4 |
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Yep, no problem!
Should be fairly easy to figure out! Those trucks speedometers only need power ground, and a VSS signal to operate
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1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap) |
08-12-2005, 08:28 PM | #5 |
Parts and more parts
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Location: Lebo, Kansas (middle of nowhere
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The early 90s vehicles had some problems with the pickup unit in the tranny failing. Once it goes the speedo will not receive information for a speed.
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08-12-2005, 08:45 PM | #6 |
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Your check engine light would also come on in that situation. If you do find out that your tranny sensor is the problem, gimme a PM, and I can send you a known good one from my 89's old blown 700r4 for the cost of shipping There is always the possiblity that your check engine light may be burnt out or something.
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1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap) |
08-12-2005, 09:15 PM | #7 |
Parts and more parts
Join Date: Nov 2003
Location: Lebo, Kansas (middle of nowhere
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Check engine light ----Not always---Had one go and the light didn't come on. My light was good also. If it is made by man, it might never work right.
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