Change the iac on a dodge ram b3500 van and still have the p0505

The ballast resistor in your 1997 Dodge B3500 van is situated under the exhaust manifold, where the engine and transmission connect. ballast resistor ' DodgeTalk Forum

Its under the exhaust manifold where the engine and transmission connect.

Check out this YT video for replacement of the part that you mentioned. This may help.

318 Dodge Ram Thermostat replacement

Try this...
Dodge Chrysler Jeep Plymouth OBD II Trouble Codes .


Or this...
P0505 IAC Malfunction

Code 505 is for a problem with the idle air control valve.
It could be the valve, or a dirty throttle body, or a problem in the harness.
If you replaced the IAC and the throttle body is clean, and the code remains, you probably need to open the harness and check the wires.

You have several RAM sub-models in here:
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B2500 RAM Van
B3500 RAM Van
RAM 1500 1/2 ton 2WD
RAM 1500 1/2 ton 4WD
RAM 2500 3/4 ton 2WD
RAM 2500 3/4 ton 4WD
RAM 3500 1 ton 2WD
RAM 3500 1 ton 4WD

Chrysler Full-Size Trucks 1989-1996 Repair Guide
To avoid confusion, remove and tag the wires one at a time for replacement.





Fig. 1: 2.5L 4-cylinder Engine. Engine Firing Order: 1-3-4-2. Distributor Rotation: Clockwise




Fig. 2: 3.9L V6 Engine. Engine Firing Order: 1-6-5-4-3-2. Distributor Rotation: Clockwise




Fig. 3: 5.2L and 5.9L V8 Engines. Engine Firing Order: 1-8-4-3-6-5-7-2. Distributor Rotation: Clockwise




Fig. 4: 8.0L V10 Engine. Engine Firing Order: 1-10-9-4-3-6-5-8-7-2. Distributorless Ignition


Hope helped with this (remember rated this help) Good luck.

Make sure connection to IAC are clean & good, and make sure you sprayed port that IAC came out of well to clean it too with throttlebody spray cleaner. Also, check all vacuum lines and intake hoses as well for cracks, holes etc. Have you stopped at Autozone, or Pep boys and have them scan & remove code, just to see if it comes back?

After the IAC is replaced it is not enough to clear the code you must also reset the IAC learned adaptive. To do this you will need a higher end scanner like snap-on or such.

p0505 is a code for your IAC (idle air control valve) located right below the TPS (throttle positioning sensor). Beware it is not necessarily the sensor. If you use a test light on the connection coming to it while the vehicle is running and rev the motor each terminal (probably four) should flash. In this case it is most likely your sensor. If not it is in the wiring or your pcm.

Try replacing the power control module