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#1 |
Junior Member
Join Date: Dec 2005
Location: Lynnwood, WA
Posts: 94
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Most of the bulbs in my instrument cluster were shot, so I replaced them and all worked with the exception of one. There is a bulb located on the top left of the speedo. It has it's own set of wires and does not rely on the circuit panel on the back of the cluster for power. This bulb is not getting any power. I tried to follow the wires, but they disappear into the factor harness. Does this particular bulb have its own fuse? Any ideas why its not lighting up.
BTW - painting the cluster chrome works great to brighten up the instrument panel. |
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#2 |
Professional Grade
Join Date: May 2003
Location: Fort McMurray, Alberta
Posts: 7,915
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Re: 87 Instrument Panel - Part II
Can you get a pic of the bulb?
The one to the left of my speedo is connected to the rest for lighting up the dash...
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1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap) |
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#3 | |
Junior Member
Join Date: Dec 2005
Location: Lynnwood, WA
Posts: 94
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Re: 87 Instrument Panel - Part II
Quote:
Does anyone have a picture of the back of the instrument cluster? |
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#4 |
Right turn Clyde
Join Date: Nov 2002
Location: Cincinnati, Ohio
Posts: 2,911
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Re: 87 Instrument Panel - Part II
That one could be loose my 84 c10 has the same problem
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1974 C25 LWB: 454 4bbl Carb / TH400 / 3.73 1992 Camaro RS 305 TBI |
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#5 |
huh ???
Join Date: Nov 2002
Location: Fredericksburg,Va.
Posts: 3,369
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Re: 87 Instrument Panel - Part II
It should go to the bottom left of the speedometer. Sounds like the 4x4 indicator lamp.Try turning the key on and shift it into 4x4 and see if the light comes on...
Chuck
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90 Blazer Silverado 350w/ 700R4 and 32" Kelly's "I am a bomb technician. If you see me running try to keep up!" Last edited by 72 CustomCamper; 01-10-2006 at 01:30 AM. |
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#6 |
Professional Grade
Join Date: May 2003
Location: Fort McMurray, Alberta
Posts: 7,915
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Re: 87 Instrument Panel - Part II
Alright, here is a pic of the back of my 80's dash, which wire is it?
I realize you've got an 87 dash, so it may be different. I've never seen an 87 dash in person yet...
__________________
1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap) |
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#7 | |
Registered User
Join Date: Sep 2004
Location: Elkins, West Virginia
Posts: 2,542
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Re: 87 Instrument Panel - Part II
Quote:
hey russell, whats that green box "thingy" laying next to the dash?....the dash i just got from f.monroe has a box like that attached to the speedometer ![]()
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1987 350 TBI lowered 5/7 |
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#8 | |
www.73-87chevytrucks.com
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Location: Birmingham, AL
Posts: 6,935
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Re: 87 Instrument Panel - Part II
Quote:
Here is a pic of Dakota's: ![]()
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Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com |
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#9 | |
Junior Member
Join Date: Dec 2005
Location: Lynnwood, WA
Posts: 94
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Re: 87 Instrument Panel - Part II
Quote:
Thanks for posting the pic Russell. I'll snap a pic of the wire tonight and post. |
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#10 | |
Junior Member
Join Date: Dec 2005
Location: Lynnwood, WA
Posts: 94
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Re: 87 Instrument Panel - Part II
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#11 |
Professional Grade
Join Date: May 2003
Location: Fort McMurray, Alberta
Posts: 7,915
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Re: 87 Instrument Panel - Part II
That is an optical speed sensor
![]() It makes a 2000 pulse per mile signal for stuff like a CCC computer, cruise control, TBI computer, or in my case, TPI computer.
__________________
1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap) |
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#12 | |
Registered User
Join Date: Sep 2004
Location: Elkins, West Virginia
Posts: 2,542
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Re: 87 Instrument Panel - Part II
Quote:
would one like this with the "optical speed sensor" work on my 85?..it dont have cruise, or tbi, or the computer hooked up for that matter ![]() ya think my 85 has a optical speed sensor?
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1987 350 TBI lowered 5/7 |
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#13 |
Registered User
Join Date: Oct 2005
Location: northern maryland
Posts: 15
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Re: 87 Instrument Panel - Part II
It sounds like your talking about the light for the ashtray
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#14 | |
Junior Member
Join Date: Dec 2005
Location: Lynnwood, WA
Posts: 94
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Re: 87 Instrument Panel - Part II
Quote:
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#15 |
Professional Grade
Join Date: May 2003
Location: Fort McMurray, Alberta
Posts: 7,915
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Re: 87 Instrument Panel - Part II
Yeah, must be the 4x4 light, cause I've never heard of one like that before...
__________________
1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap) |
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#16 |
Genuine Chevrolet
Join Date: Feb 2003
Location: South West Pennsylvania.
Posts: 582
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Re: 87 Instrument Panel - Part II
Like Russel said, it's the 4wd indicator lamp. If you hold your cluster up to the light, right below the speedometer you should see the amber 4WD in one of the holes where you currently have a bulb. Your fiber-optic for the ashtray I beleive goes in the socket hole on the top right side.
I drove my truck for 3 years before I found it had an indicator light for the 4-Wheel Drive. You can test it before you install the cluster like 72Custom Camper said.
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George 82 Silverado LWB 4x4 350 SM465 NP208 77 Chevrolet Blazer Chalet 400 TH350 NP203 |
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#17 |
Right turn Clyde
Join Date: Nov 2002
Location: Cincinnati, Ohio
Posts: 2,911
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Re: 87 Instrument Panel - Part II
You can take a bright flash light and look at it to see what it says. It works most times to get the area to illuminate like it would if it came on. Could be something related to diesel also.
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1974 C25 LWB: 454 4bbl Carb / TH400 / 3.73 1992 Camaro RS 305 TBI |
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#18 |
Professional Grade
Join Date: May 2003
Location: Fort McMurray, Alberta
Posts: 7,915
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Re: 87 Instrument Panel - Part II
If you don't have anything listed that needs a VSS, then just unscrew the optical head from the back of the speedometer, and go ahead and sell it or something
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__________________
1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap) |
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#19 |
AUSTIN TX
Join Date: Sep 2004
Location: Austin, Texas
Posts: 135
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Re: 87 Instrument Panel - Part II
where did you get the light bulbs for the panel, I also need to replace mine?
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#20 |
Professional Grade
Join Date: May 2003
Location: Fort McMurray, Alberta
Posts: 7,915
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Re: 87 Instrument Panel - Part II
Any auto parts store will have em, probally find them at the local gas station too. They are a very common bulb
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__________________
1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap) |
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#21 |
Junior Member
Join Date: Dec 2005
Location: Lynnwood, WA
Posts: 94
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Re: 87 Instrument Panel - Part II
Man the prior numb-nutz who owned my truck must have thought he was an electrical genious! I'm pulling out the early 90's pull-out tape deck, amp, and CD changer and installing a new system. The wiring job was botched so bad that it amazes me that the thing even worked at all. The truck only had two 3" dash speakers, but yet there was enough wire under the dash to fill a small garbage can. Unfortunately he snipped the factory wires and ran his own. Now I have to pull all of his crap out as well as the factory stereo loom. It's not such a bad thing to start all over, but what a mess!
As for the instrument cluster, I have got everything working except for the 4 wheel drive indicator. Don't know why it doesn't light up. For some reason the ashtray light has been removed, so I need to go to a junk yard and find one. Otherwies, the chrome paint worked out great and the dash lights up nice. ![]() |
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#22 |
Real Men Wear Orange
Join Date: Oct 2005
Location: NC
Posts: 89
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Re: 87 Instrument Panel - Part II
It's what Stacy David calls it, hacker patrol. My truck's been slightly hacked in the same department, but I was left with stock wiring. Just a quick yes or no question and I won't highjack this topic anymore but while I'm on the subject were speakers behind the driver availible on the custom deluxe trim?
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#23 |
Genuine Chevrolet
Join Date: Feb 2003
Location: South West Pennsylvania.
Posts: 582
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Re: 87 Instrument Panel - Part II
Bri87swb:
If the 4wd indicator light doesn't work, the switch may be bad on the transfer case or it might just be unplugged at the switch. If you don't find a socket and fiber-optic for your ashtray light at the junkyard just PM me. I think I have one out in the garage.
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George 82 Silverado LWB 4x4 350 SM465 NP208 77 Chevrolet Blazer Chalet 400 TH350 NP203 |
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#24 | |
Junior Member
Join Date: Dec 2005
Location: Lynnwood, WA
Posts: 94
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Re: 87 Instrument Panel - Part II
Quote:
Thanks again everyone! Take care, Brian |
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