100% outgoing electrical test coverage
100% Electrical Testing for Cable Assemblies
A project test plan separates baseline wire-map checks from conditional resistance, insulation, dielectric and signal-integrity methods.
EDPcable uses continuity, short/open, and pin-sequence checks as the common outgoing electrical baseline when they are defined in the released control plan. "100%" describes the assemblies covered by that agreed baseline, not every possible electrical or mechanical parameter. Resistance, insulation resistance, dielectric withstand, shielding, TDR, VNA, or signal-integrity work requires a separate applicability review, fixture definition, acceptance limit, sampling rule, and record format.
Capability scope
Use this page to decide which electrical method can detect the stated failure mode, what input defines acceptance, how much of the batch is covered, and what the resulting record can and cannot prove.
Continuity and wire-map checks detect opens, shorts, and miswires but do not prove impedance or system signal integrity
Low-resistance, insulation-resistance, and dielectric-withstand methods answer different questions and are not interchangeable
TDR or VNA work requires the target, fixture, reference plane, range, limits, sampling, and report output to be agreed
Batch summaries or unit-level records are defined with the test plan, including retest and nonconformance handling
Process Flow
| Step | Station / Action | Control Point | Output Record |
|---|---|---|---|
| Requirement review | Resolve drawing, netlist, governing specification, test coverage, and acceptance criteria | Conflicts and missing limits returned for clarification | Approved test-plan basis |
| Method selection | Match each fault risk to continuity, resistance, insulation, dielectric, shield, or high-speed review | No method added merely because it is available in the industry | Method applicability matrix |
| Fixture definition | Map connector cavities, common nodes, shields, and reference planes | Fixture revision tied to the product revision | Fixture definition or verification record |
| Pre-run verification | Confirm the selected setup and known-good/known-fault response where required by the plan | Verification method defined before product release | Setup verification record |
| In-process checkpoint | Apply the agreed check after the operation where the fault can first be detected | Stage and sampling or per-unit coverage stated explicitly | In-process result |
| Release test | Run only the methods and coverage named by the release plan | Result evaluated against the approved limit source | Unit or batch result, as agreed |
| Failure disposition | Identify failed unit, preserve the original result, define rework and retest route | A pass after retest does not erase the first failure | Failure and retest record |
Inspection Checkpoints
| Checkpoint | What is checked | Record | Limit |
|---|---|---|---|
| Input revision | Drawing, netlist, connector cavity numbering, and acceptance source agree | Test-plan revision reference | Cannot resolve an ambiguous customer definition |
| Node mapping | Intended opens, commons, shields, and unused contacts are represented correctly | Fixture or program verification result | Does not prove the mating connector is correct unless it is part of the check |
| Method conditions | Stimulus, duration, reference plane, and environmental conditions match the plan where applicable | Setup or run record | A method name alone is not an acceptance criterion |
| Result identity | Result can be associated with the agreed unit, lot, or batch granularity | Unit or batch result record | Traceability depth depends on the agreed identifier scheme |
| Failure and retest | Initial failure, disposition, rework, and subsequent result remain distinguishable | Failure/retest record | Retest does not establish root cause by itself |
Deliverable Records
| Deliverable Record | Stage | Use | Limit |
|---|---|---|---|
| Test-plan confirmation | Project setup | Identifies methods, coverage, limits, revisions, and record format | Does not replace the controlling customer specification |
| Fixture/program verification record | Setup or revision change | Shows that mapping and setup were checked by the agreed method | Does not establish product conformance on its own |
| Unit or batch result | Production | Records pass/fail against the named release plan | Granularity and retained data fields must be agreed |
| Failure and retest record | Production | Preserves disposition and subsequent result | Does not by itself establish corrective action effectiveness |
| Calibration or verification evidence, when applicable | Controlled interval | Supports measurement traceability required by the plan | Availability and sharing scope must be confirmed during review |
Applicable Projects
The method must follow the construction and failure risk rather than the product-family label:
eDP cable assemblies and LVDS cable assemblies: wire-map and short/open checks are common; impedance or channel review is a separate, conditional scope.
IDC cable assemblies: node order, intended commons, and short/open risk should be resolved from the connector orientation and netlist.
FFC/FPC cable assemblies: exposed-contact orientation and hybrid transitions determine the mapping and fixture approach.
Micro-coaxial cable assemblies: center conductor, shield topology, and any controlled-impedance requirement must be treated as distinct checks.
Medical cable assemblies: the customer-controlled product requirements determine method, coverage, acceptance criteria, and records; this page does not infer a medical-device compliance result.
Related Applications
For high-speed constructions, see RF and impedance testing. For hybrid exposed-contact assemblies, see FPC-to-wire hybrid assemblies. These pages address narrower validation questions and should not be treated as automatic additions to a basic continuity plan.
Why EDPcable
Outgoing electrical testing is built into the release flow for display interconnect, medical device, FFC/FPC, IDC, LVDS, and micro-coax cable projects
Test plans, fixture needs, acceptance criteria, and record format are reviewed before production
Nonconforming assemblies are isolated and followed through NCR and retest records
EDPcable does not promise tests outside current equipment capability without engineering review
FAQ
- Does "100%" mean every parameter is fully inspected?
- No. It means every assembly covered by the released plan receives the specified baseline test. It does not mean every possible electrical, mechanical, environmental, or signal-integrity parameter is inspected on every unit.
- Can you use customer-owned test fixtures?
- Yes. Customer fixtures are reviewed for station fit, fixture life, calibration needs, and record output before use.
- Are dielectric withstand and insulation resistance the same test?
- No. They evaluate different failure risks and use different acceptance definitions. Either method is added only when the cable construction, safety context, equipment scope, fixture, voltage, duration, limits, and handling plan are agreed during review.
- Can we get single-piece test records?
- Yes, if agreed upfront. Because single-piece data volume can be high, the export method and retention rule should be defined during project setup.
RFQ Inputs
For a new project inquiry, please share:
Controlled drawing, netlist, connector part numbers, cavity numbering, and product revision
Faults to detect and the requested method for each fault
Governing specification and acceptance limit for every requested method
Coverage by stage: sample, in-process, lot, or per unit
Fixture ownership, mapping, verification, and reference-plane requirements
Unit or batch identifiers, result fields, export format, and retention requirement
Failure disposition, rework, and retest rules
Send the test plan, acceptance criteria, and record format before production release
A clear test plan lets fixture setup, batch records, NCR handling, and shipment release follow the same electrical acceptance basis.