# Wire Harness Drawing to BOM: Automating the Conversion > Source: https://netray.co/resources/wire-harness-drawing-to-bom-automation > Publisher: Netray (netray.co), AI and integration engineering for ERP and manufacturing systems. > Section: Knowledge Base ## Short answer Convert harness drawings, PDFs and from-to tables into a structured BOM and wire list: what can be automated, error checks, and human review. ## Category ai-automation ## Content **Intro:** Converting a wire harness drawing into a BOM and wire list means reading the connector table, the from-to wire list, the notes and the cut-sheet, then building structured records an ERP can price and schedule. It can be partly automated: CAD exports and spreadsheets import cleanly, while PDFs and scanned drawings need extraction plus review. This guide explains the input types you will see, what to extract, the checks that catch errors, and what must remain a human decision. **Sections:** #### Know Which Input You Actually Received **Body:** Customers send harness data in very different forms, and your approach depends on which. Native exports from harness design tools such as Siemens Capital Harness, Zuken E3.series or similar produce structured data you can import with a mapping. A spreadsheet with a wire list and a PDF drawing is the most common case and is half-structured. A scanned or flattened PDF with a table of connectors and a note block is the hard case. Triage each RFQ by input type up front so the estimator knows whether to expect an import or a manual read, and keep the original file attached for audit. **Bullets:** - Native CAD or harness design export - Spreadsheet wire list plus drawing PDF - Vector PDF with text you can extract - Scanned PDF requiring OCR and review #### What a Complete Extraction Contains **Body:** The target is a set of linked records, not a text dump. Components with part numbers and quantities; wires with spec, gauge, color and length; terminations with from and to connector, cavity and terminal; splices; sleeving; labels with content and position; and notes mapped to the operations they affect, for example acceptance class or a customer specification for crimp. Each connector cavity should appear once, so a check that every populated cavity has a wire and every wire has two ends will catch most extraction mistakes. #### Validation Checks That Catch Real Errors **Body:** Do not trust any extraction, manual or automated, without rule-based checks. Compare wire count to connector pin count, confirm each terminal part number is compatible with the connector family and wire gauge range, look for duplicate cavity assignments and flag lengths outside a plausible range. Cross-check the drawing's table against its own title block revision. Flag notes that reference documents you do not have, such as a customer workmanship specification. A short exception list at the top of the draft lets the estimator spend time where it matters. **Bullets:** - Pin count versus wires terminated - Terminal and wire gauge compatibility - Duplicate or empty cavities - Revision and title block consistency - Referenced documents not on file #### Map to Your Part Master Without Creating Duplicates **Body:** Customers describe parts one way and your ERP stores them another. A good conversion matches customer part numbers to existing items by manufacturer part number, crosses to approved alternates, and proposes new items only when no match exists, with the fields your item setup needs (unit of measure, lead time, approved vendor). Duplicate items for the same terminal are an expensive cleanup, so make the match step visible and reversible. Keep customer-supplied parts distinct from purchased ones. #### Where AI Helps, and Where a Person Signs Off **Body:** A private vision and language model can read a drawing and note block, propose the structured wire list and BOM with citations back to the page region, and highlight conflicts. This works best when the model runs on your own infrastructure, which matters for ITAR or controlled technical data. It will still misread a smudged table or an unusual convention, so an engineer or estimator approves the result before it writes to the ERP. Netray builds this as an assistant that proposes and shows its sources, and writes only after approval. #### When Automation Is Not Worth It **Body:** If most of your work arrives as native exports or repeat parts you already have, an import mapping may be all you need. If volumes are a few RFQs a week, hand entry with a checklist can be faster than tuning an extraction pipeline. The payoff shows up when RFQs arrive as inconsistent PDFs at a rate that makes estimators the bottleneck. **Cta:** Send Netray a few anonymized harness drawings and we will show the extracted wire list, BOM and exception checks before you decide on anything. **Faq:** #### Can AI read a wire harness drawing PDF? **Answer:** It can extract connector tables, from-to lists and notes from many drawings, especially vector PDFs with real text, and propose a structured wire list. Accuracy varies with drawing quality and conventions, so the output should be checked against rules such as pin counts and approved by an engineer before it feeds pricing or the ERP. #### How do I import a customer's wire list into my ERP? **Answer:** Standardize on a mapping from their spreadsheet columns to your BOM and routing fields, and keep the source file attached. Match parts on manufacturer part number first, create new items only when no match exists, and run a check on cavity and pin counts before releasing the job. #### Is automated BOM extraction safe for ITAR drawings? **Answer:** Only if the processing stays inside your controlled environment. Running extraction on a cloud service can create export compliance exposure. On-prem models served from your own hardware keep the drawing inside your boundary, and access should still follow your technology control plan. ## Related Slugs - multimodal-rag-engineering-drawings-guide - syteline-bom-optimization - itar-compliant-ai-tools-manufacturing - ai-quoting-aerospace-defense-manufacturers ## Search terms wire harness drawing to BOM, extract wire list from PDF drawing, harness BOM automation, from-to table extraction, AI read engineering drawing harness, cable assembly BOM import --- Talk to an engineer: https://netray.co/contact?intent=erp_ai | Machine catalog: https://netray.co/agent/catalog.json