What warning lights should light up? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

grebus1 · 01-03-2007, 01:47 PM

With the gauge dash, should the dash warning lights light up when the key is in the "on" position (engine off) as most newer cars do? The only light I see is the brake light, which lights when I am starting the engine. I never see the temp light illuminated. I can't remember if there is a light for the oil pressure. Thanks in advance...

69rut · 01-03-2007, 02:01 PM

I say all of them. Maybe wrong on the temp light, but the oil pressure light should be on.

68speedalert · 01-03-2007, 02:51 PM

If you have a 'gauge' dash, I assume you have gauges for temp and oil pressure.

There are no warning lights except for the brake light and yours is working correctly.

On a 'idiot light' dash, the oil light is on KOEO. the temp light comes on engine cranking, I believe.

grebus1 · 01-03-2007, 04:16 PM

On my gauge dash, there is a temp light opposite the brake light (I'm not sure whether there is a oil light). I also believe there are 2 temp senders in my engine (original 402). My thought was that one was for the gauge and one was for the light, but maybe I'm incorrect about that. Any other thoughts/opinions?

Longhorn Man · 01-03-2007, 05:14 PM

the temp light is disabled in a guage panel. That other sensor is for the TCS...transmission controlled spark, a primitive emissions control device that has been disabled on 75% of these trucks.

65-72 chevytoys · 01-03-2007, 06:07 PM

Quote:

Originally Posted by Longhorn Man

the temp light is disabled in a guage panel. That other sensor is for the TCS...transmission controlled spark, a primitive emissions control device that has been disabled on 75% of these trucks.

Is the TCS on the pass or drivers side? When I got my truck the the pass side (what I thought was temp sending unit) was disconnected. I reconnected it. If I disconnect it again will it affect milage or performance?

Longhorn Man · 01-03-2007, 06:18 PM

The passenger side one is the cheesey smog deal.
I've never even seen any remains of the TCS junk... I don't know if simply unplugging it will disable the system.

68speedalert · 01-04-2007, 02:58 PM

You need to bybass it to help fuel mileage.

You need to get vacuum to the distributor advance. Follow the vacuum hose from the TCS solenoid to the carb. Discnnect it there and reconnect another piece of hose. Run that hose to the dist. advance.

You might check the advance for operation by , with KOERing, connect the hose to the advance. If you have vacuum at the end of the hose, and as the hose is connected, the engine speed should increase if the advance diaphram is good.

After you bypass the TCS, you may need to reduce the idle speed.

ClassicRedneck05 · 01-04-2007, 03:05 PM

oil pressure light? i havnt seen one on mine i have temp and brake and i cant even find where the brake light sensor goes so mines not even connected any help

68speedalert · 01-04-2007, 04:32 PM

Quote:

Originally Posted by ClassicRedneck05

oil pressure light? i havnt seen one on mine i have temp and brake and i cant even find where the brake light sensor goes so mines not even connected any help

If your truck is a 71 or 72, (what it looks like on your profile), it will have a wire going to the proportioning valve (off the master cylinder) and one to the parking brake (I think).

I can check with numberoneson's 72 tonite to see for sure with the parking brake.

ClassicRedneck05 · 01-04-2007, 04:37 PM

Quote:

Originally Posted by 68speedalert

If your truck is a 71 or 72, (what it looks like on your profile), it will have a wire going to the proportioning valve (off the master cylinder) and one to the parking brake (I think).

I can check with numberoneson's 72 tonite to see for sure with the parking brake.

i have the one going to the valve but the other wire i have no idea where it would go on the brake

Longhorn Man · 01-04-2007, 04:39 PM

67 - 72 has a wire to the prop valve.. or dist valve, which ever your ride has. There was no switch on the parking brake... just the one on the hyd system.

68speedalert · 01-04-2007, 04:47 PM

Thanks Longhorn, I wasn't sure about the parking brake.

Divorced? How long? I haven't visited for a while.

ClassicRed.....the brake light should light up on cranking. If not, try a new bulb.

Longhorn Man · 01-04-2007, 04:50 PM

I think it was the 16th of last month... but been apart more like 2 1/2 or so.

ClassicRedneck05 · 01-04-2007, 04:54 PM

alrighty thx

68speedalert · 01-04-2007, 04:56 PM

I remember when you had to give up posting on the site. Your return must have been about the same as the split it seems????

Hope all is well, all things considered.

And now.....partaaaaayyyy!!!!!!!!!!!!!

Longhorn Man · 01-04-2007, 05:42 PM

yep, I left there, and a few weeks later I got a phone call from a local member, some one didn't get a light I had shipped and was asking if anyone knew where to find me, and I've been back since.
All that is great, it's the future stuff that may be kinda sucky. Might explain more later.

01-03-2007, 01:47 PM	#1
grebus1 Registered User Join Date: Feb 2000 Location: Edmonds, WA Posts: 322	What warning lights should light up? With the gauge dash, should the dash warning lights light up when the key is in the "on" position (engine off) as most newer cars do? The only light I see is the brake light, which lights when I am starting the engine. I never see the temp light illuminated. I can't remember if there is a light for the oil pressure. Thanks in advance... __________________ '72 Chevy Suburban Custom Deluxe 10, 402/TH400

01-03-2007, 02:01 PM	#2
69rut Registered User Join Date: Sep 2006 Location: SE Virginia Posts: 158	Re: What warning lights should light up? I say all of them. Maybe wrong on the temp light, but the oil pressure light should be on. __________________ trailers are for boats

01-03-2007, 02:51 PM	#3
68speedalert Semi-Senior Member Join Date: Feb 2003 Location: Washington, MO Posts: 390	Re: What warning lights should light up? If you have a 'gauge' dash, I assume you have gauges for temp and oil pressure. There are no warning lights except for the brake light and yours is working correctly. On a 'idiot light' dash, the oil light is on KOEO. the temp light comes on engine cranking, I believe. __________________ '68 50th Anniversery LWB Custom Fleetside, '77 305 v-8, turbo 350, factory speed alert (still works), '71 drivetrain w/front discs. Some call it ugly yellow, others call it Ochre '83 Jeep CJ-7, <80,000 miles, original owner '04 Chevy Suburban, 4x4, 2500, 6.0 ltr, Predator Diablo programmer '95 GMC K1500 Extended cab

01-03-2007, 04:16 PM	#4
grebus1 Registered User Join Date: Feb 2000 Location: Edmonds, WA Posts: 322	Re: What warning lights should light up? On my gauge dash, there is a temp light opposite the brake light (I'm not sure whether there is a oil light). I also believe there are 2 temp senders in my engine (original 402). My thought was that one was for the gauge and one was for the light, but maybe I'm incorrect about that. Any other thoughts/opinions? __________________ '72 Chevy Suburban Custom Deluxe 10, 402/TH400

01-03-2007, 05:14 PM	#5
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: What warning lights should light up? the temp light is disabled in a guage panel. That other sensor is for the TCS...transmission controlled spark, a primitive emissions control device that has been disabled on 75% of these trucks.

01-03-2007, 06:18 PM	#7
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: What warning lights should light up? The passenger side one is the cheesey smog deal. I've never even seen any remains of the TCS junk... I don't know if simply unplugging it will disable the system.

01-04-2007, 02:58 PM	#8
68speedalert Semi-Senior Member Join Date: Feb 2003 Location: Washington, MO Posts: 390	Re: What warning lights should light up? You need to bybass it to help fuel mileage. You need to get vacuum to the distributor advance. Follow the vacuum hose from the TCS solenoid to the carb. Discnnect it there and reconnect another piece of hose. Run that hose to the dist. advance. You might check the advance for operation by , with KOERing, connect the hose to the advance. If you have vacuum at the end of the hose, and as the hose is connected, the engine speed should increase if the advance diaphram is good. After you bypass the TCS, you may need to reduce the idle speed. __________________ '68 50th Anniversery LWB Custom Fleetside, '77 305 v-8, turbo 350, factory speed alert (still works), '71 drivetrain w/front discs. Some call it ugly yellow, others call it Ochre '83 Jeep CJ-7, <80,000 miles, original owner '04 Chevy Suburban, 4x4, 2500, 6.0 ltr, Predator Diablo programmer '95 GMC K1500 Extended cab

01-04-2007, 03:05 PM	#9
ClassicRedneck05 Senior Member Join Date: Dec 2005 Location: Humble, Texas Posts: 262	Re: What warning lights should light up? oil pressure light? i havnt seen one on mine i have temp and brake and i cant even find where the brake light sensor goes so mines not even connected any help

01-04-2007, 04:39 PM	#12
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: What warning lights should light up? 67 - 72 has a wire to the prop valve.. or dist valve, which ever your ride has. There was no switch on the parking brake... just the one on the hyd system.

01-04-2007, 04:47 PM	#13
68speedalert Semi-Senior Member Join Date: Feb 2003 Location: Washington, MO Posts: 390	Re: What warning lights should light up? Thanks Longhorn, I wasn't sure about the parking brake. Divorced? How long? I haven't visited for a while. ClassicRed.....the brake light should light up on cranking. If not, try a new bulb. __________________ '68 50th Anniversery LWB Custom Fleetside, '77 305 v-8, turbo 350, factory speed alert (still works), '71 drivetrain w/front discs. Some call it ugly yellow, others call it Ochre '83 Jeep CJ-7, <80,000 miles, original owner '04 Chevy Suburban, 4x4, 2500, 6.0 ltr, Predator Diablo programmer '95 GMC K1500 Extended cab

01-04-2007, 04:50 PM	#14
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: What warning lights should light up? I think it was the 16th of last month... but been apart more like 2 1/2 or so.

01-04-2007, 04:54 PM	#15
ClassicRedneck05 Senior Member Join Date: Dec 2005 Location: Humble, Texas Posts: 262	Re: What warning lights should light up? alrighty thx

01-04-2007, 04:56 PM	#16
68speedalert Semi-Senior Member Join Date: Feb 2003 Location: Washington, MO Posts: 390	Re: What warning lights should light up? I remember when you had to give up posting on the site. Your return must have been about the same as the split it seems???? Hope all is well, all things considered. And now.....partaaaaayyyy!!!!!!!!!!!!! __________________ '68 50th Anniversery LWB Custom Fleetside, '77 305 v-8, turbo 350, factory speed alert (still works), '71 drivetrain w/front discs. Some call it ugly yellow, others call it Ochre '83 Jeep CJ-7, <80,000 miles, original owner '04 Chevy Suburban, 4x4, 2500, 6.0 ltr, Predator Diablo programmer '95 GMC K1500 Extended cab

01-04-2007, 05:42 PM	#17
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: What warning lights should light up? yep, I left there, and a few weeks later I got a phone call from a local member, some one didn't get a light I had shipped and was asking if anyone knew where to find me, and I've been back since. All that is great, it's the future stuff that may be kinda sucky. Might explain more later.



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