BT OE35, Service Manual

Page: 313 / 332

Micro 70 Wire Guidance
PS S8.0 8200
F-code Section C-code
Version no T-code
001 OE35
© BT Products
311
Service Manual 1997-10-24
The first steps of any troubleshooting procedure should be:
1. Inspect the truck and components for physical
damage and mechanical malfunction. Wires must
not be chafed or cut. Relays must be free to move
and the contact tips must not be burnt or welded.
2. Check for ground faults from the electrical system to
the frame using an ohmmeter. A minimum of 20,000
(20K) ohms resistance from the frame to any and all
wiring and electrical components is acceptable.
3. Check that the battery is fully charged and
connected.
4. Operate the truck in all modes to determine the exact
operating symptoms. Do not forget that these
systems are equipped with safety
circuits that
prevent operation in the event of improper operating
procedures or component failure.
It is inevitable that some problems may occur whose fault
cannot be found by normal troubleshooting procedures.
When this happens the technician is reduced to the task of
changing parts until the failed part is replaced and the truck
begins to operate properly.
Even when the technician
becomes a parts changer there are certain rules to follow.
Never install an obviously damaged component on any truck.
A damaged component installed on a previously good
operating truck may very well cause damage to other
components. Likewise, never install new or known good
components on a malfunctioning truck to test the truck. It is
preferable to install undamaged components from the failed
truck onto a known good operating truck. In this way the
possibility of collateral damage to other components is
decreased.
The following tools and equipment are required for
troubleshooting and repair:
1. A digital multimeter (DVOM) such as a Fluke 8060A
or equivalent.
2. Common mechanic's hand tools.
3. Wiring diagrams and repair manual.
4. A functioning line driver and guide path.
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