97Dually

Finally decided that ABS would be good for the winter weather comming up. I actually had two problems. The first was the light bulb for the ABS system was out. That explained the never seen it before syndrome!!
Anyway, repleced light bulb and FINALLY. I had a real symptom. My manual says that the rear wheel speed sensor was supposed to have 500-1000 ohms of resistance. Nope! It was wide open. So I replaced the sensor, only $51 bucks at Dealer...Yipee! I finally have anti-lock brakes! Easy repair, 25 minutes maybe. Gotta love the info from this site!

Second issue. My grid heater cycled far too little. Based on the ambient outdoor temps, I should have had more cycles that just ONE. Put in key, wait to start light--a few seconds-and that's it. Heck, I was down to 35* and no cycles. So, i pulled the intake sensor out and put my fluke to it and measured ohm's. BAD. It kept thinking it was 65* when I was outside in 40*. It worked, but poorly. A whopping $25 bucks for a new sensor and.....you guessed it. Fixed!

Another 10 minute fix! ;D

Tom

kandgo

Gooddeal on the repairs.I am contemplating on puting my grids on a switch,wonder if anyone has done this?? Or is there any down falls? I am thinking they come on when not needed too much, My old 91 was done that way with no problems,and I have heard of some guys taking them completly out!! Give me some opinions???? Thanks Rick

Smokee

I don't think that you will cause any problems using a switch, but I really do not see the advantage unless something is wrong. The cycling heater will certainly make you more popular with your neighbors!

HammerMTB

[quote author=kandgo link=board=16;threadid=23280;start=0#msg218453 date=1070595047]
Gooddeal on the repairs.I am contemplating on puting my grids on a switch,wonder if anyone has done this?? Or is there any down falls? I am thinking they come on when not needed too much, My old 91 was done that way with no problems,and I have heard of some guys taking them completly out!! Give me some opinions???? Thanks Rick
[/quote]
If they are on a switch, will you remember to turn them off? When they were first engineered and put on, one of the main concerns was their running too long and melting, then being eaten by the engine. Since they are past the air-to-air, gobs of molten grid heater, if it fails, will be in your cylinder in a heartbeat.
The purpose of the control module is to cycle them and turn them off when not needed. It does a pretty good job. They never hurt anything even when they do run and engine is already warm. I like mine the way they are. I'm sure opinions vary, tho! ;D

kandgo

Thanks HammerMTB,I never thought about the leaving on that would creat havoc!!!,as my 91 was on seperate timer, they would keep cycling on and off thru the after market add on switch when it was on. I am in full agreement as not to mess with them until a problem arises.Now for my 91 it was in the wire harness and I did not want to go there as it was easier to go around that mess to me at the time. Thanks allot, Rick

HammerMTB

Kandgo, if you want to wire your grid heqaters, you could wire them so they wouldn't work from your switch, or when on they would be controlled by the PCM. Rather than blather on here, if you like that idea, I can detail it to you in a PM. Write & let me know if you are interested.