7060 ??
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Car: An Ol Buick
Engine: Vsick
Transmission: Janis Tranny Yank Converter
7060 ??
On my 91 454 TBI'd truck there are two coolant temp senders in the heads (one in each), both with what look to be green wires on them. There is a coolant temp guage (and no light), and you the CTS with it's yel/blk is on the intake. None of my wiring diagrams give any hint of what the second one might be. Anyone have an answer?.
Also, does anyone know for sure the PPM output of the DRAC (and where it is)?.
TIA
Also, does anyone know for sure the PPM output of the DRAC (and where it is)?.
TIA
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Car: 83 POS monte carlo 2015 chevy P/U
Engine: 92 5.7 tpi 5.3
Transmission: 700r4 6L60E
Axle/Gears: 2.42 too high
on the 2 temp senders, i don't know. maybe the second sending unit is for a towing package?
chevy used 2 different setups on the trucks, on the first 1 the VSS signal went to the dash where they put the DRAC at & then to everything else. the other setup used an external DRAC, i think you will have the extenal setup which i think is the better system.
i think the trucks use 128000 A/C pulses per mile output from the speed sensor to the DRAC, the DRAC converts that into a 2000 & a 4000 pulse per mile square wave, it seems like there are 2 or 3 4000 pulse outputs on the DRAC. i believe the 4000 goes to the ECM, ABS, & dash with the 2000 for cruise control.
if you have the second DRAC system, you should find the DRAC in a small white box right around the glove box area.
i can post a picture of a DRAC if you want 1.
you can speed up or slow down the outputs by changing the jumpers inside the DRAC.
chevy used 2 different setups on the trucks, on the first 1 the VSS signal went to the dash where they put the DRAC at & then to everything else. the other setup used an external DRAC, i think you will have the extenal setup which i think is the better system.
i think the trucks use 128000 A/C pulses per mile output from the speed sensor to the DRAC, the DRAC converts that into a 2000 & a 4000 pulse per mile square wave, it seems like there are 2 or 3 4000 pulse outputs on the DRAC. i believe the 4000 goes to the ECM, ABS, & dash with the 2000 for cruise control.
if you have the second DRAC system, you should find the DRAC in a small white box right around the glove box area.
i can post a picture of a DRAC if you want 1.
you can speed up or slow down the outputs by changing the jumpers inside the DRAC.
Last edited by DENN_SHAH; 12-04-2005 at 12:30 AM.
#4
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Car: An Ol Buick
Engine: Vsick
Transmission: Janis Tranny Yank Converter
Originally posted by Fast355
Doesn't it run the extra electric cooling fan?
Doesn't it run the extra electric cooling fan?
I thought that ran off of the HVAC controller.
With that in mind, now, I can expect a result from tinkering.
Thanks.
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Car: An Ol Buick
Engine: Vsick
Transmission: Janis Tranny Yank Converter
Originally posted by DENN_SHAH
chevy used 2 different setups on the trucks, on the first 1 the VSS signal went to the dash where they put the DRAC at & then to everything else. the other setup used an external DRAC, i think you will have the extenal setup which i think is the better system.
i think the trucks use 128000 A/C pulses per mile output from the speed sensor to the DRAC, the DRAC converts that into a 2000 & a 4000 pulse per mile square wave, it seems like there are 2 or 3 4000 pulse outputs on the DRAC. i believe the 4000 goes to the ECM, ABS, & dash with the 2000 for cruise control.
if you have the second DRAC system, you should find the DRAC in a small white box right around the glove box area.
i can post a picture of a DRAC if you want 1.
chevy used 2 different setups on the trucks, on the first 1 the VSS signal went to the dash where they put the DRAC at & then to everything else. the other setup used an external DRAC, i think you will have the extenal setup which i think is the better system.
i think the trucks use 128000 A/C pulses per mile output from the speed sensor to the DRAC, the DRAC converts that into a 2000 & a 4000 pulse per mile square wave, it seems like there are 2 or 3 4000 pulse outputs on the DRAC. i believe the 4000 goes to the ECM, ABS, & dash with the 2000 for cruise control.
if you have the second DRAC system, you should find the DRAC in a small white box right around the glove box area.
i can post a picture of a DRAC if you want 1.
I know what it looks like, was just curious about it's outputs, the 2,000 PPM is what I was hoping for...
Thanks
#6
Originally posted by DENN_SHAH
.....i think the trucks use 128000 A/C pulses per mile output from the speed sensor to the DRAC, the DRAC converts that into a 2000 & a 4000 pulse per mile square wave, it seems like there are 2 or 3 4000 pulse outputs on the DRAC. i believe the 4000 goes to the ECM, ABS, & dash with the 2000 for cruise control.
.....
.....i think the trucks use 128000 A/C pulses per mile output from the speed sensor to the DRAC, the DRAC converts that into a 2000 & a 4000 pulse per mile square wave, it seems like there are 2 or 3 4000 pulse outputs on the DRAC. i believe the 4000 goes to the ECM, ABS, & dash with the 2000 for cruise control.
.....
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Car: 1990 Chevy 454SS
Engine: 454
Transmission: TH400
Temp Sensors...
Finally, a question I can answer! Yippee!
The big block trucks, at least on the SS's, have 3 temp sensors. The one in the intake goes to the ECM. The other two, one in each head, go to the Temp gauge and the aux fan.
I think the passenger side sensor is for the aux fan, but I could have it backwards. Unplug the drivers side and see if the dash reading goes out.
Factory setting for the aux fan was pretty high. 220 or 230 or so, CRS acting up again.
Hope this helps.
The big block trucks, at least on the SS's, have 3 temp sensors. The one in the intake goes to the ECM. The other two, one in each head, go to the Temp gauge and the aux fan.
I think the passenger side sensor is for the aux fan, but I could have it backwards. Unplug the drivers side and see if the dash reading goes out.
Factory setting for the aux fan was pretty high. 220 or 230 or so, CRS acting up again.
Hope this helps.
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