Tuesday, December 21, 2010

Wiring thermostat for 120v heater

The code requires that all ungrounded conductors are disconnected. The double pole thermostat that you have described is for a 220v heater.
2 wire method


It is crucial for your 120v heater, that there is 120v from black to white! Not 220v
L1 and T1 pass through when there is a demand for heat
L2 and T2 pass through when there is a demand for heat

A house wired prior to 2008 would have the white wire , wire-nutted through even if it was 220v heater system; Where a house wired after 2008 the white wire would have landed on the L2 and again on the T2

If the supply voltage is 120v; Then you only need the L1-T1 side of the thermostat and the L2 and T2 wires are not needed

With the current code the 220v system is required to break all of the line wires.
220v systems that used baseboard heaters did not require a neutral wire; Instead the white wire carries 120v to ground and the black wire also carries 120v to ground. Across each other they measure 210-240v
(A 120v heater should not be used in this situation)

L1 being black (powered wire) and L2 being white (powered side)
The black of the (heater wire) T1 and the white of the (heater wire)

This method will work on the 120v heater as well but is not required. On a 120v heater the thermostat only needs L1(black powered wire) and T1 (Black heater wire)

The white wires can be wire-nutted together and stuffed in the back of the box

3 Wire method

If there is a red, black , white, and ground in the box; This would be a three wire system.

The black wire will be 120v to ground, the red will be 120v to ground, and the white will be a return path. From black to red will be 220v

Use the black powered wire as L1 and the black of the heater wire as T1. Tie the white of the powered wire directly to the white of the heater wire,
In this situation the thermostat only separates and connects the power wires together when there is a demand for heat.

Monday, December 20, 2010

pre 1995 Dodge ECM engine codes

The codes for Pre-1995 Dodge Trucks are retrieved from the ECM, by counting the check engine light flashes.
1.) Turn key on, off, on, off, on......and wait

Then the light will flash for example
On/off/on/OFF......On/off/on/off/on/OFF.............................
This will be a 23 code...

Then it will move on to the next code, until it flashes on a 55 code
on/off/on/off/on/off/on/off/on/off....on/off/on/off/on/off/on/off/on/OFF...........
This will be the 55 code or end of message

So it will read like so
On/off/on/OFF......On/off/on/off/on/OFF............................................
on/off/on/off/on/off/on/off/on/off....on/off/on/off/on/off/on/off/on/OFF...........
.




Below are the OBD DTC's for 1995-previous model year EFI-equipped Dodge vehicles.



11 camshaft signal or ignition signal, no reference signal during cranking

12 memory to controller has been cleared within 50-100 engine starts

13 map sensor not detecting any change during test

14 map voltage too high or too low

15 vehicle speed sensor, no signal detected

16 knock sensor circuit. open or short detected

17 low engine temperature, possible thermostat fault

21 oxygen sensor signal, neither rich or lean detected

22 coolant sensor voltage low

23 air charge voltage high/low detected

24 throttle position sensor voltage high/low

25 automatic idle speed motor driver circuit, short or open detected

26 injectors 1,2,3 peak current not reached

27 injector control circuit does not respond to control signal

31 purge solenoid circuit, open or short detected

32 egr solenoid circuit, open or short detected

33 a/c clutch relay circuit, open or short detected

34 speed control servo solenoid, open or short detected

35 radiator fan control relay circuit, open or short detected

36 waste-gate solenoid, open or short detected

37 part throttle unlock(PTU) circuit, open or short detected

41 charging system circuit not responding to control signal

42 fuel pump or auto shutdown (ASD) relay voltage sensed at controller

43 ignition control circuit not responding

44 battery temperature voltage circuit problem

45 turbo boost limit exceeded-map sensor detects over-boost

46 battery voltage too high

47 battery voltage too low

51 air/fuel at limit

52 logic module fault

53 internal controller failure

54 camshaft reference circuit not detected

55 end of message

61 baro read solenoid, open or short detected

62 emr mileage not stored

63 eprom write denied

64 flex fuel sensor signal out of range

65 manifold tuning valve, open or short detected

66 no ccd messages

76 ballast bypass relay, open or short detected

77 speed control relay, open or short detected

Import Car Code Definition

1 oxygen sensor

2 crank engine sensor

3 air flow sensor

4 barometric pressure sensor

5 throttle positioner sensor

6 motor position sensor

7 engine coolant temperature sensor

8 no.1 cylinder tdc sensor

12 air flow sensor

13 air temperature sensor

14 throttle positioner sensor

15 sc motor position sensor

21 engine coolant temperature sensor

22 crank angle sensor

23 no.1 cylinder tdc sensor

24 vehicle speed sensor

25 barometric pressure sensor

31 knock sensor

32 manifold pressure sensor

36 ignition timing adjustment signal

39 oxygen sensor

41 injector

42 fuel pump

43 egr

44 ignition coil

52 ignition coil

53 ignition coil

55 iac valve position sensor

59 heated oxygen sensor

61 transaxle control unit cable

62 warm up control valve position sensor

Wiring a ceiling fan with optional lights, and seperate switches in two gang box.


1. Mount a two gang device box on the stud, at about 48" above the floor, to the top of the box

2. Secure a ceiling fan rated box to the joist,rafters, or trusses. ( add framing as needed to secure box directly to lumber

3 Pull 14-2 wire from a 15 amp circuit, to the two gang box you have just finished putting on the wall

4. Pull a 14-3 wire from the two gang box to the ceiling fan box you have added

5. Expose all of the inner conductors from a 1/4" of the boxes integeral clamp, to expose six inches of free conductor in each location

6. Strip the ends of all conductors, to expose 1/2" bare copper on all wires

7. At ceiling fan box, attach Black to black, white to white, red to blue, and bare to green

8. At the two gang box you will tie all of the white wires together under one wire nut (tan)

9. You will need to make two six inch pieces of black wire, strip both ends. then tie one end of each piece together with the black wire that comes out of the 14-2 (power in)

10. Tie all of the bare conductors together with two 6" tails (intended to land one on each switch, under the green screw)

11. Land the black wire from the 14-3 ( from ceiling) to a brass screw on one of the switches. Then land one of the powered pig tails on the remaining brass screw of the switch

12. The remaining red wire will land on one of the brass screws, and the remaining black (power pig tail) will land on the last brass screw.

13. install all switches , and the fan on the ceiling

14. Attach the 14-2 intended to power up your project to a powered outlet on a 15 amp circuit, matching colors as well

Sunday, December 19, 2010

Finding the number one position on Chevy HEI Distributor


1. First you must locate the number one cylinder. (This will be the drivers side plug, closest to the front of the engine.)

2. Remove the coil and distributor cap and have an assistant rotate the engine by using the starter. (observe the location and rotation of the rotor and the engine pulleys)

3. Now remove the furthest front spark plug on the drivers side of the car and lower a long screw driver into the hole.

4. Using a six point socket and a rachet. rotated the engine slowly in the direction the pulleys were spinning durring starter function. ( This will be an easier task with all of the spark plugs removed from the head )

5. Carefully watch the screwdriver for change in elevation with the rotation of the engine.

6. Observe the line marked on the harmonic balancer pulley. As this line approaches the teeth on the timing stand off, So will the piston be reaching the Top Dead Center (TDC) location, and so will the rotor be pointing nearest the #1 plug wire post.

7.Finally, the screw driver will reach its furthest "TOP" point, and under the valve cover, the two rockers to that cylinder will be loose (if you want to expose that)

8. Looking at the rotor and which post it is pointing at,eill expose the Number one position.

9. Back the timing line off the TDC mark by about six degrees , or three marks and twist the distributor itself into the position that lines the rotor up with a post towards the center of its twistable range.

10. Install the distributor cap and place number one wire on the post directly over the rotor tip. THAT IS WIRE ONE LOCATION

11. Following the direction of the rotor rotation, install wire eight, then four, three, six, five, seven , and two

Other usable tid=bits
In some cases, the cylinder number might be cast on the intake port right above the cylinder.

The distributor rotation may also be indicated, by having an arrow cast onto the intake manifold, near the distributor