esc - The 1947 - Present Chevrolet & GMC Truck Message Board Network

2birds40 · 04-26-2004, 09:54 PM

i did a search and see that i need to cut the black and green wires to disconnect the esc now do they get taped togher or does green go to green and black to black thanks

Slonaker · 04-26-2004, 10:17 PM

This is the photos that Mike used to have on 73-87.com that explains it. The article is still there on the site, but the photo link is dead.

Slonaker

2birds40 · 04-27-2004, 06:30 PM

hey thanks for the help got that all taken care of now i want to remove the harness for it but there are 2 wires running to a vacume siloniod of some sort on the pass. side fire wall what is it and do i need it i know i don't need the rest of the wiring but those two have me puzzeled by the way they are yellow and brown wires thanks

Slonaker · 04-27-2004, 11:27 PM

Sorry, I don't know anything about it. I just remembered Mike's pic, and thought it would help...

Slonaker

greg0380 · 04-28-2004, 11:06 AM

It sounds like you are running an auto transmission. Those two wires go to a VAC TIP IN switch. There should be a vac line going to this switch connect to intake vacuum. If I remember right, it senses sudden changes in manifold vacuum and the switch would momentarily close. The ESC used this signal to control the spark on sudden vac changes. If you bypassed your ESC, then the switch does nothing. You will see TIP IN switch on the original emissions sticker (if you still have it). Mike Ervin explains the operation in his link. Good luck, Greg.

2birds40 · 04-28-2004, 02:59 PM

hey thanks for the help guys i looked at the sticker it is the vac tip in so it will be gone by tonight

04-26-2004, 09:54 PM	#1
2birds40 Registered User Join Date: Apr 2004 Location: new york Posts: 26	esc i did a search and see that i need to cut the black and green wires to disconnect the esc now do they get taped togher or does green go to green and black to black thanks

04-26-2004, 10:17 PM	#2
Slonaker Insert Witty Text Here Join Date: Oct 2002 Location: San Antonio, TX Posts: 3,415	This is the photos that Mike used to have on 73-87.com that explains it. The article is still there on the site, but the photo link is dead. Slonaker __________________ '86 Chevy C10 (Sold 04/19/13 ) Stock '01 Silverado

04-27-2004, 11:27 PM	#4
Slonaker Insert Witty Text Here Join Date: Oct 2002 Location: San Antonio, TX Posts: 3,415	Sorry, I don't know anything about it. I just remembered Mike's pic, and thought it would help... Slonaker __________________ '86 Chevy C10 (Sold 04/19/13 ) Stock '01 Silverado

04-27-2004, 06:30 PM	#3
2birds40 Registered User Join Date: Apr 2004 Location: new york Posts: 26	hey thanks for the help got that all taken care of now i want to remove the harness for it but there are 2 wires running to a vacume siloniod of some sort on the pass. side fire wall what is it and do i need it i know i don't need the rest of the wiring but those two have me puzzeled by the way they are yellow and brown wires thanks

04-28-2004, 11:06 AM	#5
greg0380 Registered User Join Date: Dec 2003 Location: CT Posts: 454	It sounds like you are running an auto transmission. Those two wires go to a VAC TIP IN switch. There should be a vac line going to this switch connect to intake vacuum. If I remember right, it senses sudden changes in manifold vacuum and the switch would momentarily close. The ESC used this signal to control the spark on sudden vac changes. If you bypassed your ESC, then the switch does nothing. You will see TIP IN switch on the original emissions sticker (if you still have it). Mike Ervin explains the operation in his link. Good luck, Greg.

04-28-2004, 02:59 PM	#6
2birds40 Registered User Join Date: Apr 2004 Location: new york Posts: 26	hey thanks for the help guys i looked at the sticker it is the vac tip in so it will be gone by tonight



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