Troubleshooting
69
conduit may not be detected by the following test. The only
sure way is to inspect the coax and associated conduit for
trapped water.
1. Disconnect all three wires of the coaxial cable at the
electronic unit.
2. Disconnect all wires at the sensing element end of the
coax.
3. Using an ohmmeter, measure between two of the
coaxial cable conductors. Note any reading. Repeat for
all three conductors. All readings should show an open
circuit, (innite resistance).
SHORT OUT
TWO CONDUCTORS
CENTER - GROUND
CENTER - SHIELD
SHIELD - GROUND
OHMS
OHMS
OHMS
SHORTED WIRES SHOULD READ 0 OHMS
CHECK FOR CONTINUITY
8
0
"0"
"0"
"0"
OHMMETER
4. Check for continuity of each conductor. Short out two
of the coaxial cable conductors and measure these two
conductors at the other end. A reading close to 0 ohms
should be shown.
6.8 Troubleshooting Coaxial Cable (Continued)
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