What is this? Photo eye?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

fade94 · 07-25-2005, 03:49 PM

On our 83 Chev, mounted next to the speedo on the back of the inst. panel, there appears to be a photo eye mounted. It is held in with one screw with 3 wires going to a yellow box. Is this part of cruise control? If so, can someone provide pics of cruise/turn switch and under hood components?

86 GMG · 07-25-2005, 04:36 PM

how about a picture of yours?

Russell · 07-25-2005, 05:37 PM

That is your VSS (Vehicle Speed Sensor) The truck uses the signal it produces (2 pulses per speedometer cable revolution) to tell both the ECM how fast you are going (ECM = Electronic Control Module, basically the computer in the truck, ECM will be found on feedback carbed trucks, and is that silver box behind your glove box) and in some cases, is used for running the cruise control setup (not 100% sure about the 82-86 trucks, they may have a transducer style cruise setup yet...)

86k10 · 07-26-2005, 12:20 AM

Yes that's the speed sensor for the cruise.

fade94 · 07-26-2005, 08:02 AM

Anybody have pics of a working cruise setup? The truck was in pieces when we got it. I would like to know what to look for to get the cruise working.

gchemist · 07-26-2005, 07:53 PM

I gave up fixing the cruise on my 83. Instead I installed a cruise control from www.rostra.com.
Read about it here http://www.geocities.com/abetterchemist/cruise.html

FLAGG · 07-27-2005, 03:22 PM

I have a working cruise on my 86 Sierra. I have some underhood shots of the truck, but it looks like the air cleaner and brake booster are blocking the parts you want to see. If I can get my hands on a digital camera I'll get some shots of the underhood stuff.

fade94 · 07-27-2005, 03:55 PM

Many, many thanks.
gchemist- how much was the kit? I went to the Rostra.com site and they did not show a kit for my 83?

Russell · 07-27-2005, 07:15 PM

Oh, by the way:

If one of you guys has the chance, can you snap me a picture of the order that the wires go into the green box? There will be a black, pink and black and yellow wire, I had to remove the pins from mine and I cannot remember the order anymore...

07-25-2005, 03:49 PM	#1
fade94 Registered User Join Date: Mar 2005 Location: Melissa, TX Posts: 799	What is this? Photo eye?? On our 83 Chev, mounted next to the speedo on the back of the inst. panel, there appears to be a photo eye mounted. It is held in with one screw with 3 wires going to a yellow box. Is this part of cruise control? If so, can someone provide pics of cruise/turn switch and under hood components? __________________ 68 short bed driver (71 clip on it now, swapping to 68 when weather cooperates) 67 short step project (will get SWB from the 68) 67 Camaro, #'s matching (my wife's) 03 Dodge Ram 2500 4x4 diesel 5 speed 4.10 rear

07-25-2005, 04:36 PM	#2
86 GMG Registered User Join Date: Apr 2005 Location: Tulsa Oklahoma Posts: 943	how about a picture of yours? __________________ square body trucks an addiction or an investment either way they consume all my extra time and money

07-25-2005, 05:37 PM	#3
Russell Professional Grade Join Date: May 2003 Location: Fort McMurray, Alberta Posts: 7,915	That is your VSS (Vehicle Speed Sensor) The truck uses the signal it produces (2 pulses per speedometer cable revolution) to tell both the ECM how fast you are going (ECM = Electronic Control Module, basically the computer in the truck, ECM will be found on feedback carbed trucks, and is that silver box behind your glove box) and in some cases, is used for running the cruise control setup (not 100% sure about the 82-86 trucks, they may have a transducer style cruise setup yet...) __________________ 1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap) Last edited by Russell; 07-25-2005 at 05:38 PM.

07-26-2005, 12:20 AM	#4
86k10 Registered User Join Date: Feb 2003 Location: Bertrand, Nebraska Posts: 355	Yes that's the speed sensor for the cruise. __________________ 98 Neon 97 Grand Prix GT 02 Grand Prix 40th Anniv. 86 GMC 5.0 77 Olds 98 6.6 REAL AMERICANS, DRIVE AMERICAN

07-26-2005, 08:02 AM	#5
fade94 Registered User Join Date: Mar 2005 Location: Melissa, TX Posts: 799	Anybody have pics of a working cruise setup? The truck was in pieces when we got it. I would like to know what to look for to get the cruise working. __________________ 68 short bed driver (71 clip on it now, swapping to 68 when weather cooperates) 67 short step project (will get SWB from the 68) 67 Camaro, #'s matching (my wife's) 03 Dodge Ram 2500 4x4 diesel 5 speed 4.10 rear

07-26-2005, 07:53 PM	#6
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	I gave up fixing the cruise on my 83. Instead I installed a cruise control from www.rostra.com. Read about it here http://www.geocities.com/abetterchemist/cruise.html

07-27-2005, 03:22 PM	#7
FLAGG Registered User Join Date: Feb 2004 Location: St. Albert, Alberta, Canada Posts: 89	I have a working cruise on my 86 Sierra. I have some underhood shots of the truck, but it looks like the air cleaner and brake booster are blocking the parts you want to see. If I can get my hands on a digital camera I'll get some shots of the underhood stuff.

07-27-2005, 03:55 PM	#8
fade94 Registered User Join Date: Mar 2005 Location: Melissa, TX Posts: 799	Many, many thanks. gchemist- how much was the kit? I went to the Rostra.com site and they did not show a kit for my 83? __________________ 68 short bed driver (71 clip on it now, swapping to 68 when weather cooperates) 67 short step project (will get SWB from the 68) 67 Camaro, #'s matching (my wife's) 03 Dodge Ram 2500 4x4 diesel 5 speed 4.10 rear

07-27-2005, 07:15 PM	#9
Russell Professional Grade Join Date: May 2003 Location: Fort McMurray, Alberta Posts: 7,915	Oh, by the way: If one of you guys has the chance, can you snap me a picture of the order that the wires go into the green box? There will be a black, pink and black and yellow wire, I had to remove the pins from mine and I cannot remember the order anymore... __________________ 1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap)



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