Resistor size for AIH delete
Post Fiend
Joined: Feb 2007
Posts: 14,541
Likes: 2
From: Dallas-Ft. Worth
If the heater element is .4 ohms, 35A at 14V would flow through it (voltage/resistance=current). Not sure where the 470 ohm resistor goes, but if it's supposed to fool the PCM into thinking SOMETHING is there besides an open, 470 ohms would flow ~.029A well below the 1/4A rating. Let us know if it works!!
Post Fiend
Joined: Feb 2002
Posts: 10,600
Likes: 3
From: Carhenge
Originally Posted by Izzy351
If the heater element is .4 ohms, 35A at 14V would flow through it (voltage/resistance=current). Not sure where the 470 ohm resistor goes, but if it's supposed to fool the PCM into thinking SOMETHING is there besides an open, 470 ohms would flow ~.029A well below the 1/4A rating. Let us know if it works!!
Post Fiend
Joined: Feb 2006
Posts: 11,892
Likes: 2
From: Middle Tennessee
Originally Posted by clux
It works, I've run one for over 3 years, no codes.
Trending Topics
Post Fiend
Joined: Feb 2002
Posts: 10,600
Likes: 3
From: Carhenge
Originally Posted by Tenn01PSD350
Got a picture of that? I get the AIH soft code but haven't really cared. Got tired of clearing it so I don't bother with it.
I think I have some resistors I'll mail to you if anybody wants one, they come in a pack of 5 from Radio Shack. PM me if you want one and I'll look for them tonight.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
Post Fiend
Joined: Feb 2006
Posts: 11,892
Likes: 2
From: Middle Tennessee
Originally Posted by clux
I don't have a picture, it is just a Radio Shack 470 ohm 1/4 watt resistor soldered to enough 16 gauge wire to reach from the GPR to the stock ground location on the block, wrapped with electrical tape, with an appropriate sized eye on both ends.
I think I have some resistors I'll mail to you if anybody wants one, they come in a pack of 5 from Radio Shack. PM me if you want one and I'll look for them tonight.
I think I have some resistors I'll mail to you if anybody wants one, they come in a pack of 5 from Radio Shack. PM me if you want one and I'll look for them tonight.
Hotshot
Joined: Nov 2006
Posts: 11,286
Likes: 263
From: North of Greenville
So, when DFUser says that their P041 AIH Code Eliminator is "more than just a wire", I guess what they're not saying is that the code eliminator is a 16 gauge wire with a 470 ohm resistor soldered in.
Hmmm... $19 to DFUser, or less than $3 in my own parts, the resistor being the only part I don't already have.... I think I'll make my own "code eliminator".
Thanks guys... I've been hoping that someone would eventually run through this issue with the details necessary to not spend the $19 plus S&H to DFUser.
http://www.dfuser.com/mfg/powerstroke/73/Intake/AIH.php
Hmmm... $19 to DFUser, or less than $3 in my own parts, the resistor being the only part I don't already have.... I think I'll make my own "code eliminator".
Thanks guys... I've been hoping that someone would eventually run through this issue with the details necessary to not spend the $19 plus S&H to DFUser.
http://www.dfuser.com/mfg/powerstroke/73/Intake/AIH.php
Cargo Master
Joined: Sep 2007
Posts: 2,470
Likes: 535
From: Chandler, AZ
Originally Posted by Izzy351
If the heater element is .4 ohms, 35A at 14V would flow through it (voltage/resistance=current). Not sure where the 470 ohm resistor goes, but if it's supposed to fool the PCM into thinking SOMETHING is there besides an open, 470 ohms would flow ~.029A well below the 1/4A rating. Let us know if it works!!
R = V/(P/V)
my question is, since the element is isolated with the relay, how does the PCM know its there? it could only read the resistance of the relay coil. is there another wire that feeds back the element voltage to the pcm? Either way I will try one out. I think that the resistor can be placed on the relay, as it has both connections needed; ground for the coil and the element wire.
Post Fiend
Joined: Feb 2007
Posts: 14,541
Likes: 2
From: Dallas-Ft. Worth
Hey!! Good catch. I did get my A & W mixed up. 470 ohms would flow ~.03A at 14V (which is voltage/resistance). To get power, you need this: power=current^2 x resistance, which is .03^2 * 470 = .423 watts, or as smokey says, just under .5W. A 1/2W resistor would be best here.
Last edited by Izzy351; Nov 30, 2007 at 05:20 PM.
Thread Starter
|
Post Fiend
Joined: Jun 2004
Posts: 9,293
Likes: 10
From: Parker, CO
Yeah the 470 ohm 1/4 watt resistor didn't work. Still have the AIH code being thrown (soft code) and I can't run the CCT.
So what are you guys saying? I need to double up the resistors I have and run them parallel? I bought a 5 pack so I have a few to spare. Or do I need to get a different size (750 or 820 ohm 1/2 watt)?
I'm trying to run a CCT test to track down a knocking sound. Passes all other tests with flying colors, just can't run a CCT yet.
So what are you guys saying? I need to double up the resistors I have and run them parallel? I bought a 5 pack so I have a few to spare. Or do I need to get a different size (750 or 820 ohm 1/2 watt)?
I'm trying to run a CCT test to track down a knocking sound. Passes all other tests with flying colors, just can't run a CCT yet.