TPS Wiring Dilemma
Thread Starter
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
TPS Wiring Dilemma
The clip on my TPS harness connector was broken, so I wanted to change the connector just to prevent it from maybe coming loose sometime down the road.
AutoZone and O'Reilly's in my area don't carry them, so rather than order one, with the added markup and cost, I decided to pay a visit to my local wrecking emporium.
Found one that looked the same and had the same color wires (3) that my harness has. Back home, matched the wire colors, soldered the new connections and tested the voltage with my DVM.
All looked normal. I lowered base voltage to .55 and checked that I had .445 at WOT. GREAT; things are falling right in place.
WRONG! Engine wouldn't start; cranked but no start.
Head scratching time.
So I unplug the TPS and engine fires right up.
More head scratching.
Plug the TPS back in and no start, again.
After more, you know what, I re-checked my wire connections and sure enough all the wire colors were correctly matched. White to white, black to black and blue to blue. Re-checked voltages and they were as before, all as I'd set them, but still no start with the TPS connected.
So, like the "Grinch Who Stole Christmas" my Puzzler was gettin' tired, when I decided to break with convention and swap two of the wires. BINGO!!!
Voltages were the same (.55/.445) and engine fired and ran normally.
The connector I bought didn't come off a Vette, so apparently the wire colors were moved for whatever reason GM came up with.
I swear, I believe GM does this kind of stuff deliberately to keep me confused.
Anyway, all's well that ends well.
Jake
AutoZone and O'Reilly's in my area don't carry them, so rather than order one, with the added markup and cost, I decided to pay a visit to my local wrecking emporium.
Found one that looked the same and had the same color wires (3) that my harness has. Back home, matched the wire colors, soldered the new connections and tested the voltage with my DVM.
All looked normal. I lowered base voltage to .55 and checked that I had .445 at WOT. GREAT; things are falling right in place.
WRONG! Engine wouldn't start; cranked but no start.
Head scratching time.
So I unplug the TPS and engine fires right up.
More head scratching.
Plug the TPS back in and no start, again.
After more, you know what, I re-checked my wire connections and sure enough all the wire colors were correctly matched. White to white, black to black and blue to blue. Re-checked voltages and they were as before, all as I'd set them, but still no start with the TPS connected.
So, like the "Grinch Who Stole Christmas" my Puzzler was gettin' tired, when I decided to break with convention and swap two of the wires. BINGO!!!
Voltages were the same (.55/.445) and engine fired and ran normally.
The connector I bought didn't come off a Vette, so apparently the wire colors were moved for whatever reason GM came up with.
I swear, I believe GM does this kind of stuff deliberately to keep me confused.
Anyway, all's well that ends well.
Jake
Team Owner
Joined: Jan 2003
Posts: 20,322
Likes: 248
From: Summerland B.C. Canada
Re: TPS Wiring Dilemma (JAKE)
:smash: Sounds like G.M.
Glad you got her fixed. :thumbs:
I bought mine from ecklers and the $4 price seemed fine. Then throw on shipping, handling, duty, customs broker fee, then exchange rate and two more taxes and it gets crazy. It was after I bought it a web search revealed that there are several companies making these and I could have had my local jobber bring it in for peanuts :crazy: :smash: :smash: :smash:
Now that I know better and have a catalogue from one of them, I will replace all the ones with broken clips. :cheers:
Glad you got her fixed. :thumbs:
I bought mine from ecklers and the $4 price seemed fine. Then throw on shipping, handling, duty, customs broker fee, then exchange rate and two more taxes and it gets crazy. It was after I bought it a web search revealed that there are several companies making these and I could have had my local jobber bring it in for peanuts :crazy: :smash: :smash: :smash:
Now that I know better and have a catalogue from one of them, I will replace all the ones with broken clips. :cheers:
Pro
Joined: Jun 2001
Posts: 509
Likes: 5
From: Edmonds WA
Re: TPS Wiring Dilemma (JAKE)
I swear, I believe GM does this kind of stuff deliberately to keep me confused.
Burning Brakes
Joined: Jul 2002
Posts: 871
Likes: 0
From: Costa Mesa CA
Re: TPS Wiring Dilemma (K87ZZ4)
Yeah....
When doing something like that, I just notice the order from top to bottom of the three wires with the original connector still on. The just hook the new connector up with the wires from you car in the same order, regardless of the order they are on the new connector.
FWIW,
BIG JIM
When doing something like that, I just notice the order from top to bottom of the three wires with the original connector still on. The just hook the new connector up with the wires from you car in the same order, regardless of the order they are on the new connector.
FWIW,
BIG JIM
